But according to developer Harmonix, none of this is really its fault -- nope, it's the Wii that's to blame, specifically the lack of a Wii hard drive. Quoth Harmonix design director Rob Kay: "[...] We need a hard drive. That's what we want. The whole problem is there's nowhere to store it. If the platform could do it, we'd jump on it."
Which is a valid point, actually. With single songs on other versions weighing in at around 30 - 45MB, the Wii's 512MB of internal storage would fill up quickly. We remain justifiably cross, however, at the missing online play.