From my favorite fan site, atU2.com:

A new song and a cover of Scottish punk band the Skids' "The Saints Are Coming" with Green Day will be found on a U2 compilation due Nov. 21 via Interscope. The as-yet-untitled set, which will also be available in a deluxe edition, will feature "16 of U2's best-songs," according to the band's Web site.

Both the new song and the Skids cover were recorded last month at London's Abbey Road Studio with producer Rick Rubin. U2 and Green Day debuted the cover live last week at the re-opening of the New Orleans Superdome; it is available for download exclusively until Oct. 30 via Rhapsody, after which point it will hit additional download retailers. A CD single will follow on Nov. 6.

U2's most recent compilation, The Best Of 1990-2000, was released in December 2002 and included material up through the 2000 album All That You Can't Leave Behind.

Achtung Baby is still my favorite U2 album, but the first Best Of CD covering the band's first decade is definitely the better compilation disc.

While the 90s were U2's, um... "experimental" years, they still put out a lot of great material that never made it onto that 1990-2000 volume. Hopefully they pick the best stuff from 2000 to today on this new edition. Still, I am a little curious... if there are sixteen tracks (aside from the two new songs), isn't that basically everything leftover from the last two albums?

Am I really crazy enough to buy a CD filled with songs I already own?

Probably.