If you're one of the PS2 holdouts looking to grab Rock Band before upgrading it might be time to reconsider. We all expected the PS2 version to be a step behind graphically but it turns out more than just sharper resolution is going to be missing from the PS2 release.

Joystiq is reporting that Rock Band for the PS2 will lack online play as well as downloadable content - one of Rock Band's major selling points I think. To make matters worse Harmonix has also left out the World Tour mode.

A final nail in the coffin for the PS2 version is a lack of customization. According to Joystiq "you'll play as a pre-made band each time you load up a song (the band differs based on the genre of the song you chose)."

Ouch - even the first Guitar Hero offered a choice of avatars. If you're desperate for playing Rock Band and haven't upgraded to a next gen system yet you may have no choice - I recommend waiting it out if possible.