U.S. jobless claims surge to 26-year high (highest since October 1982)
reuters.com
reuters.com
http://www.bls.gov/cps/uiclaims.htm
Those numbers also probably understate the problem, but not for the reason you mentioned; the official unemployment numbers do not include people that are underemployed or those that have stopped actively looking for a job.
I'll be honest, I'm not overly worried about unemployment. Good ideas will still be able to take off, and talent that may have previously unavailable to a startup will now be easier to acquire. Unemployment is a huge problem and I feel for everyone I know who has been affected by the recent downturn, but I sincerely believe that it is our job as entrepreneurs to help alleviate this problem.