There's also a link near the end of this page where you can click and find out how much will be deposited, and when.
http://www.irs.gov/individuals/artic...181665,00.html
Here's what mine says: Your payment of $XXXX is scheduled to be deposited to your bank on May 9, 2008. If you do not receive the credit by May 14, 2008, check with your bank to find out if it has been received. Please wait until May 14, 2008 before you contact us again because we are unable to take any action until then.