The Television Without Pity board on BSG had a very interesting post that suggested that the Raiders and Centurions were among the 12 models, so somewhere between seven and nine models so far.  Also, a lot of people have suggested that Roslin's aide, Tory, was a Cylon.  It's entirely possible both Tory and Billy were Cylons, but I suppose we'll find out in October sometime.

One thing I would have wanted to see in the intervening year was what the response to the nuking of Cloud 9 and the other ships was, especially regarding the confidence in Baltar's leadership.  I would imagine it would have been somewhat similar to Bush post-September 11, in that it was a catastrophic event occuring relatively near the time the new president took power, but we don't see if anybody has suggested that Baltar had something to do with it.