In a blow to the future of account aggregation, Wells Fargo, the second largest online bank in the 
United States, is discontinuing its OneLook account aggregation service which ran on software from Teknowledge (click on the email message from Wells Fargo to customers, left). The Wells Fargo in-house account aggregation service, installed in November 2002, was the first to be integrated into its online banking services with its own tab.
For more information on the subject and the Wells Fargo service in particular, read Online Banking Report, #96/97 Account Aggregation 3.0.
--JB