There is a new drum set out by itself already that is a new version for rockband 2.
There will be a different set coming out tho that will cost about $300 or so that you can fully convert into a real electronic drum kit.
right now i can only sing the vocals on rock band 2 and they seem a bit easier than the first, tho that may be due to my practice with rock band 1. i do like the songs tho, they are fun to sing
i never thought they would put battery for metallica in or a song by alice in chains.
Tip! - If you want the vocal expert 100% achievement and/or the 5 gold star achievement all you have to do is play Sabotage by the Beastie Boys (on expert of course.) the song is 100% spoken word so all you have to do is pretty much hum continuously into the mic. The hardest part will be trying to find a spot to catch your breath.