More US tax questions

I just started filing on the free turbo tax form and I have some questions. I would be grateful if anyone could help!
I am going to file "married filing separately" and it asks for my husband's SS#, what is it again that I need to put in that field?

Also, it asks for my employers address. I work for the NHS so do you think I could just put in the address of the hospital I work for? It also asks for how much money I made but I don't have any form that tells me exactly what I made in 2010.  It also asks for foreign house credit? Do people usually fill in this field with how much they pay in rent, etc? 

This is my first time doing this so I feel a little overwhelmed but I'm trying! Again, I would be truly grateful to anyone who could help. I'm sure I will have my questions...

Use "NRA" for your husband's SS#.

I would agree you can just enter the address of the place where you normally work.

Since you won't be receiving a W-2 as you would if you worked in the US, just use your payslips to figure how much you earned during 2010, then convert the total into dollars using the unofficial rates from the US Embassy (£1 = $1.54 for 2010).

I think your question refers to the foreign housing exclusion. If you earned less than the maximum foreign earned income exclusion ($91,500), you can ignore this as you probably already qualify to exclude all your earnings. In that case, just tell TurboTax you don't want to take the housing exclusion. If you earned more than that, the IRS has a list here to help you decide which items should be included in your housing expenses calculation. Rent counts, as do electricity, gas, water, council tax, and home insurance.