According to SeattlePI.com,

The number of home sale deals in April was the highest since August 2007, as buyers apparently decided prices had come down enough, combined with low interest rates and a federal tax credit, according to a new report.

Non-scientifically I can attest to this since I am staffing the front office of my real estate company at the moment and I have seen a big uptick in calls and emails and almost every listing we have received an offer in the last three weeks.

Read Area home sales sprang up in April Prices continued to fall from a year earlier