Here is an online calculator to determine if and how much you will receive (directly from the IRS website):

http://www.irs.gov/app/espc/

And when to expect the rebate:

DIRECT DEPOSIT

Last two SSN digits: Payment will be transmitted:
00 through 20 May 2
21 through 75 May 9
76 through 99 May 16
PAPER CHECK

Last two SSN digits: Payments will be mailed by:
00 through 09 May 16
10 through 18 May 23
19 through 25

May 30
26 through 38 June 6
39 through 51 June 13
52 through 63 June 20
64 through 75 June 27
76 through 87 July 4
88 through 99 July 11


For married couples filing a joint return, the last two digits in the
first Social Security number listed on the return will be used to
determine when the rebate will be sent.

By Boxzgrl on Tuesday, March 18, 2008 - 01:13 pm:

Sorry I forgot the make the link clickable, I can't remember how!

By Dawnk777 on Tuesday, March 18, 2008 - 02:34 pm:

IRS Info

By Brandy on Tuesday, March 18, 2008 - 11:09 pm:

I received a letter in the mail today...

By Dawnk777 on Wednesday, March 19, 2008 - 12:58 am:

Cool!