[quote name='GunstarRed']Seems like they have every song ever on any KR game.[/QUOTE]
Pretty much, broken down as follows:
Packs 1-6 are everything from KR2 that isn't part of the Xbox version of KR1.
Packs 7-13 are everything from KR3 that isn't 'Snake Eater' or 'Waiting For You' (both from other Konami games, and both in the free pack).
Packs 14-20 have ALMOST everything from the PS2/Xbox versions of KR1 (for those who only have Party), except for the extra Motown tracks from the Xbox version and a handful of other tracks. (It also misses 'Science Genius Girl', but that's in the free pack anyway.)
The only songs from the main series - not counting CMT and American Idol - that you can't get by downloading (but can get by finding KR1 for Xbox) are the ten Motown songs, 'Red Red Wine', and 'Smooth Criminal'.
(Thanks, Wikipedia!
)
I seem to have found some torrents of the song packs, but I'm not sure how to go about actually using them once downloaded.
Anyway, we've already got Party and one mic - just trying to find the other Xbox version in a bundle to get a second mic and the Motown songs. We've been talking about tracking down the PS2 titles, but now I'm wondering if it wouldn't be cheaper to just nab packs 1-13 from Live, especially with how hard KR2 is to find (and how expensive when you do find it).