If filing jointly then your SSD checks are considered income and added to your husbands income, do your deductions from their.

Or, you can file married but seperate, SSD checks are still considered income but you'll lose most of your deductions if you do.
Always itemize IMO.
You'll be getting that stimulas check in the spring only if you file a tax return for 2007. You should be $300.00, husband $600.00 and a child will get you another $300.00. This is of course subject to your income. If your combined $ is under $100K (guessing, but it's a relatively high income amount that's allowed) you should get it.
And Yes, the stimulas checks are considered income too. Geez...