Yup, lots of interesting implications trotted out in this episode.
The Bar Owner is obviously the dog. On his wall there was a picture of a dog guarding a girl. He has either been drawn to Sookie or has been assigned to Sookie (to watch/protect her).
Bill said that vampires get stronger as they get older. And he's already extremely strong. Makes you wonder just what the old vampires are capable of.
Vampire blood is capable of healing lethal wounds, and probably curing lethal diseases. This makes vampire blood one of the most valuable medical substances ever known.
The Anti-Vampire crusader and his family almost certainly did NOT die in a freak accident. This implies that at least some of the vampires are organized and ready to kill for political reasons.