I'm thinking about picking up a pair of Lips wireless mics for the three-part harmonies in The Beatles: Rock Band. Has anyone tried this? I know they are compatible, but one of the reviewers on Amazon says he has a lot of lag from his wireless microphones on Rock Band 2. He says the lag is much greater than that of the wired mic and that he is unable to fix it through calibration. I would love to have the wireless mics, but I don't want to screw my scores!

works fine for me

 I'll go check

okay i played while my guitar gently weeps with both and from what i can tell the lips mics seems to be more sensitive. 
all the options were the same and this was on hard.