AOC Aon Corp.

Riverbed's Steelhead Appliances enable near- real-time application performance and file transfers and facilitate improved client service delivery CHICAGO, July 17 /PRNewswire-FirstCall/ -- McLagan Partners, a consulting firm serving the financial industry, today announced it has deployed new technology aimed at expediting delivery of compensation surveys to clients around the world, and reducing cycle times for data transformation, preparation and report delivery. (Logo: http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO) Riverbed Technology's Steelhead(R) wide-area data services (WDS) appliances have been deployed at McLagan Partners' Connecticut headquarters and at branches in New York, Chicago, London, Tokyo and Hong Kong. McLagan Partners is a unit of Aon Consulting, the human capital and management consulting organization of Aon Corporation (NYSE:AOC). "Since we deployed Riverbed's Steelhead appliances, response time has improved by a factor of 100 and the time to open an application has dropped from almost four minutes down to just a few seconds," said John Anderson, vice president of infrastructure at McLagan Partners. "In fact, from our global users' point of view, access is instantaneous." The Steelhead appliances have enabled McLagan Partners to improve its global disaster recovery strategy. The company is building a global disaster recovery (DR) platform with redundancy across continents for mission-critical data preparation and delivery platforms to ensure McLagan's clients maintain uninterrupted service for their survey and reporting needs. About Riverbed Riverbed Technology is the performance leader in wide-area data services (WDS) solutions for companies worldwide. By enabling application performance over the wide area network (WAN) that is orders of magnitude faster than what users experience today, Riverbed(R) is changing the way people work, and enabling a distributed workforce that can collaborate as if they were local. Additional information about Riverbed (NASDAQ:RVBD) is available at http://www.riverbed.com/. Riverbed Technology, Riverbed, Steelhead, RiOS, Interceptor, and the Riverbed logo are trademarks or registered trademarks of Riverbed Technology, Inc. All other trademarks used or mentioned herein belong to their respective owners. About Aon Consulting Aon Consulting Worldwide (http://www.aon.com/hcc) is among the top global human capital consulting firms, with 2006 revenues of $1.282 billion and 6,500 professionals in 117 offices worldwide. Aon Consulting is reshaping the workplace of the future through benefits, talent management and rewards strategies and solutions. In August 2006, Aon Consulting was named the best employee benefit consulting firm by the readers of Business Insurance magazine. About Aon Aon Corporation (http://www.aon.com/) is a leading provider of risk management services, insurance and reinsurance brokerage, human capital and management consulting, and specialty insurance underwriting. There are 43,000 employees working in Aon's 500 offices in more than 120 countries. Backed by broad resources, industry knowledge and technical expertise, Aon professionals help a wide range of clients develop effective risk management and workforce productivity solutions. This press release contains certain statements related to future results, or states our intentions, beliefs and expectations or predictions for the future which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from either historical or anticipated results depending on a variety of factors. Potential factors that could impact results include: general economic conditions in different countries in which we do business around the world, changes in global equity and fixed income markets that could affect the return on invested assets, fluctuations in exchange and interest rates that could influence revenue and expense, rating agency actions that could affect our ability to borrow funds, funding of our various pension plans, changes in the competitive environment, our ability to implement restructuring initiatives and other initiatives intended to yield cost savings, our ability to execute the stock repurchase program, our ability to obtain regulatory or legislative changes to permit continuous sales of our supplemental Medicare health product, changes in commercial property and casualty markets and commercial premium rates that could impact revenues, changes in revenues and earnings due to the elimination of contingent commissions, other uncertainties surrounding a new compensation model, the impact of investigations brought by state attorneys general, state insurance regulators, federal prosecutors, and federal regulators, the impact of class actions and individual lawsuits including client class actions, securities class actions, derivative actions, ERISA class actions, the impact of the analysis of practices relating to stock options, the cost of resolution of other contingent liabilities and loss contingencies, and the difference in ultimate paid claims in our underwriting companies from actuarial estimates. Further information concerning the Company and its business, including factors that potentially could materially affect the Company's financial results, is contained in the Company's filings with the Securities and Exchange Commission. MEDIA CONTACTS Aon Consulting: Raphaele Schnoll 312.755.3592 Riverbed: Kim Kapustka 415-344-4476 http://www.newscom.com/cgi-bin/prnh/20041215/CGW049LOGO http://photoarchive.ap.org/ DATASOURCE: Aon Corporation CONTACT: Raphaele Schnoll of Aon Consulting +1-312-755-3592, , or Kim Kapustka of Riverbed, +1-415-344-4476, Web site: http://www.aon.com/

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