Martyn Brown, Producer at Team 17, posted on his site the following details:
Update is being finalised to fix:
Hosting a four player game where the game crashes, which occurs when more than four players join the lobby. Obviously this isn’t meant to happen
Exploits that slipped through the testing net are to be fixed
AI will hurry the hell up and take 1-2 seconds max
AI also won’t be so deadly accurate with the grenades
DLC to include:
One new theme (background theme, not the dashboard)
Dashboard themes and gamerpics
Considerably more voice-bank options
Considerably more audio (he mentions it separately to voice-banks)
Also, the word filter for Worms is not imposed by Team 17, that is done by Microsoft
Date to follow (we’re expecting the title update to come first and that’s taking priority);
PREMIUM DLC
Gamerpics 150 pts (standard MS pricing)
Worms Dashboard Theme 150 pts (standard MS pricing)
DLC
Speech Pack 1 (FREE) - A dozen or so speech banks. **
Space Theme & Audio (FREE) - New background level to play on
Audio Pack (FREE) - Various background audio and Worms theme
Expect additional speech packs, level themes, more audio, gamerpics and dashboard themes from then on. Some of the content will be charged, some will be free.
**Africaan, Angry Scots, Classic, Cyberworms, Danish2, DanisPyrus, DoubleohSeven, Dutch, Dutch2, Finnish, Greek, Hungarian, Irish, Norwegian, Polish, Portuguese, Redneck, Russian, Scouser, Stiff Upper Lip, Swedish & Swedish 2 (Note: It is currently hoped that all speech banks will be supplied FREE).
The update for Worms XBLA will come very soon, it's now ready to go. It fixes a number of connectivity issues, various bugs and leaderboard glitches, adds a bit more fizz to mines and additionally speeds up the AI.
DLC will follow later this month and there's a Worms day on XBLA on 17th May!