Episodic game-makers Telltale Games (Sam & Max, Strong Bad) have announced that Wallace & Gromit's Grand Adventures will also be coming to Xbox Live Arcade this spring as well as the PC. The press release also says the developer will be producing other thus far unannounced titles for XBLA. Few details are available at this point, but they are promising a new user interface tailored for the 360.
Also on the same release, Telltale announced that they are giving away an episode of Strong Bad or Sam & Max (for the PC) when you sign up for the newsletter before the end of February. Just head over to http://www.telltalegames.com/mytelltale/subscriptions/
to subscribe and get your free episode.
Of course, if that doesn't interest you, this reporter already bit the bullet and signed up so you'll be able to find the latest news here.