I am thinking of getting back into this game after being away for more then a year. Is there a listing as to what sets are now Tournament Legal?

Legacy - All cards are legal, except for what's on the banned list. (Banned list is referenced in the "please read before posting" post if you need the link to find it.

Standard - All cards with the 4 pointed star, or 5 pointed star are legal. Those cards from from:

Set 7: Darkstalkers / Streetfighter - Fight for the Future (Some of the cards in the set were printed with a 4 pointed star)

Set 8: Street Fighter: Domination / SNK - Cutting Edge

Set 9: Darkstalkers - Realm of Midnight / Street Fighter - Deadly Ground

Set 10: SNK - King of Fighters / Soul Calibur - Flash of the Blades

Set 11: Street Fighter - Warriors Dream / SNK - Flames of Fame

Set 12: Shadowar / Soul Calibur IV - Tower of Souls

Mini-Block - All cards with a 5 pointed star are legal. Those cards come from:

Set 12: Shadowar / Soul Calibur IV - Tower of Souls

To find out what cards are in each set, feel free to check the following resource:
http://twoheadeddragon.com/ufs/index.html