Colt's current catalog shows 20 or 21 versions of the Model O Government Model pistol and 36 versions of the Single Action Army revolver.
I can't find a reference to it right now, but I read that Colt introduced (or re-introduced) a couple more Government Model pistols at the S.H.O.T. show.
There have always been rumors that Colt is bringing back some DA revolvers.

