Ugh, Harmonix is always favoring PlayStation! They only released Guitar Hero 1 and Rock the 80's on PS2, released GH2 on PS2 long before 360, Rock Band Unplugged was released exclusively on PSP, and now this?! When will they throw us 360 users a bone?!
No, no, but really. It should be interesting to see what this really is all about. I wonder if Sony said to HMX, "Ok, you can use these songs... But only if you produce a SingStar: The Beatles (or something like that) for PS3." (Sony holds the rights to most McCartney/Lennon songs, from what I understand.)