If you become unemployed before the adjustment of status interview, and this issue comes up at the adjustment interview, the USCIS adjudicating officer will ask you to find a joint sponsor before s/he can approve your wife's adjustment of status. You do not need to bring your unemployment paperwork as it is not relevant. I recommend gathering all of the necessary joint sponsor documentation before the interview. They are: (1) proof of status, (2) most recent Form 1040 tax return, (3) proof of income.
Answered on Jan 17th, 2011 at 10:43 AM