The upcoming Battlestar Galactica miniseries will be called "Razor" and there will be some familiar faces in the cast.  According to TVShowsOnDVD, the movie, which is really just a two-part episode, will air on November 24th.  Fans will finally see the history of Adm. Cain (Michelle Forbes) and the Pegasus as the crew fled the Cylons before they met up with the Galactica.  More importantly, the movie "covers a span of about 50 years, and two wars between the humans and the robotic Cylons," said Exec Producer Ron Moore.
  The title refers to a quote from "Patton":  "In about fifteen minutes, we're going to start turning these boys into fanatics - razors."

Exec Producer David Eick said, "[Y]ou'll see the original Cylon centurions and the original Cylon Raiders. It had to happen sometime."

Additionally, the entire refular cast is slated to appear, and while the cliffhanger ending(s) of Season Three will not be resolved, apparently a lot of backstory for what happened in the last episode will be parceled out.

And finally as a teaser tidbit: D'Anna (Lucy Lawless) is coming out of the box and still has her own role to play before the end.

(Additional Source: Home Media Magazine)