Havent had much about TeamArena lately. PQ got a quick bit from Robert Duffy of id on the new weapons and gametypes. In addition I stopped by id to check out the pack before leaving and will have my own write-up/info on the mod when I get home. Here is a bit of it:

All of the weapons and items in Team Arena are fully usable in all game types but the Team Arena maps have the class based powerup set for team play only. There is no reason why community mappers cannot produce maps where the class powerups work in Deathmatch. Balancing might be an issue but as long as care is taken it would work out fine.