Rosters: Check out
this thread. It has download links and instructions for CBL 2.0, which is the roster set I'm using now.
Face Packs: Try
here. DraftDodger has put together a terrific facepack, which works well with CBL 2.0.
Logos: I have some at
my site. They're also available at
www.ootpdownloadcenter.com. Ultimately, any logo set from OOTP5 will work.
Skins: I don't think any skins specifically for 6 have been released yet, but I've successfully used skins from OOTP5, although I never tried playing a game with one.
--Eriq.