I know Cyril's been asking for this for a while and well, the
new patch lets you use the
Lips or the Microsoft Wireless Mics with
Rock Band 2 now along with a few other things. You can grab a list of updates from
the forum post but another nice little addition is that it adds the handling of chord hammer ons and pull offs from
The Beatles: Rock Band into the game as well.
Now, with the support for a wireless mic, I don't see why you wouldn't pick up the
Lips pack which features two mics over the single wireless mic that Microsoft sells at around the same price.