Frankly speaking, I have mixed feelings about Baccano! being adapted into a manga after it was animated: think about horrible cases like Mai HiME?. Besides, the novel illustrations are so gorgeous that it's somehow difficult having to accept a different art style at this point of the year.
Yet the Grand Punk Railroad saga lives on. According to Narita, there will be new characters (or rather, characters that had minor presence in the novel but still without a name) introduced based on his unused plot bunnies so that part should be nice to look forward to. Gun's & Roses might take the initiative to scanlate Baccano! the manga in early/mid-2008 using help from a couple of our sister networks, so check back again soon for updates!