Check out the slick, almost retro (I'm thinking the original Thomas Crown Affair titles) sequence for Definitely, Maybe. Actually, a really cute film - especially if you find Ryan Reynolds delicious. And the song is by Sly and the Family Stone.
You can watch it here - click on the red link for Definitely_Maybe.mov: http://www.dexigner.com/design_news/imaginary-forces-creates-lyrical-opening-sequence-for-definitely.html
or, to see the bigger version, go to the Imaginary Forces website (click on Play Movie, but you'll have to wait about two minutes):