Everything you might want to know about unemployment calculations...

...but didn't care enough to research for yourself.

The BLS has a pretty good explanation of all the various rates (u-1 through u-6), the PDF can be found here

If you want the very most recent data (Feb 09) you'll have to grab the table yourself on the BLS website. Nationwide U-6 was 16% in February.
http://www.bls.gov/news.release/empsit.t12.htm is where the table can be found