WINTERVILLE, NC, May 21, 2007 – ONLINE Information Services, Inc. announced today the completion of the integration of the ONLINE Utility Exchange with the Harris Cayenta Utilities customer information system. This integration will allow Cayenta’s utility customers to have an integrated business tool to eliminate bad debt at the point of service application.

Through its partnership with the ONLINE Utility Exchange, Harris Cayenta can now provide an integrated real-time credit risk assessment tool to their customers. The ONLINE Utility Exchange product will utilize application data within the Cayenta customer information system to verify the applicant is who they say they are, help set an accurate deposit amount according to the deposit policies of the Utility, access unpaid utility bills and disconnects from ONLINE’s unique national Utility Exchange database and also provide any unpaid Utility bills from other national data sources. Further, the integration will allow Harris Cayenta customers to send their customer payment information to ONLINE in an automated fashion so that their utility customers that typically do not pay will be tracked from one utility to the next through ONLINE’s national Utility Exchange database.

In the past, the financial burden of bad-debt and charge-off accounts were spread across the entire customer base of the Utility. According to ONLINE President, J.W. Blair, “With the ONLINE Utility Exchange, we work with Utilities who are facing losses each year and are looking for methods to reduce risk when customers first request service. We help the Utility analyze the risk and set a deposit level that meets their guidelines by utilizing information from past payment histories, unpaid debts, and collections data from our Exchange database. We are excited with the opportunity to work with Cayenta Utilities and their customers. Cayenta provides their clients with world class technology and systems for the Utilities market and ONLINE looks forward to assisting their customers in the elimination of bad debt at the point of application.” Cayenta Vice President, Brad Atchison adds, “Cayenta is very excited about the synergy that exists between our two organizations allowing us to partner with the ONLINE Utility Exchange and offer our customers a leading edge solution.”

About the ONLINE Utility Exchange
ONLINE Information Services, Inc. has been in business since 1956, first as a Credit Bureau and Collections Agency, and now as a provider of Risk Management tools for the Utility and Property Management Industries. The ONLINE Utility Exchange is a utility specific credit bureau with the single goal of providing utilities with the tools necessary to eliminate bad debt. The ONLINE Utility Exchange operates nationwide. For more information visit www.ONLINEUtilityExchange.com.

About Harris
Harris is a wholly owned subsidiary of Constellation and is a leading provider of software and business solutions to the utility, local government and school management markets. Since 1976, Harris has focused on providing feature-rich and robust turnkey solutions to all of its customers throughout North America. Harris' focus is on creating long-term relationships with our customers and ensuring that we meet the changing needs of our customers over time. For further information on Harris Computer Systems, visit our website at www.harriscomputer.com.

About Constellation
Constellation acquires, manages and builds vertical market software businesses that provide mission critical software solutions. Constellation's common shares are listed on the Toronto Stock Exchange under the symbol "CSU". Further information about Constellation may be obtained from the Company's web site at www.csisoftware.com.

# # #