Many people own Lips, but only the Guitar Hero World Tour Guitar Bundle. So you would assume that some kind of support would be added to GHWT to make the Lips microphone work with GHWT.
Well, it’s been said that no kind of support is planned to be added for the microphone. Which sucks, because to get the microphone for GHWT, you’d have to buy the whole thing, and what’s the point when you have a classy lips one lying around. Shame on you Activision.