True. I'm a little less resistant to DLC, especially in a format like RB where it truly does add to the game, while still being optional, than I am to using the "DLC" method as a way of patching buggy/incomplete console games. DLC is easy to abuse, and we could say "don't release the game till it's complete", but in the case of some games, it is complete, but six months or a year later they release optional maps or whatnot for a reasonable price. Of course, their motive in this is at least threefold: stretch out the revenue stream, revive interest in an old game, and get us more used to buying nonresellable, "secure", price-fixed DRMed digital content.
I have a Wii and a 360, and though I don't game online much, I never have on the Wii, it's just too much of a hassle. I like having access to the DLC on 360, and I really like the interactive dashboard, though I wish they'd put a web browser on it (I understand some of the arguments against it).
I like RB DLC because now I don't have to wait for Rock Band Add-On Disk #3 and buy thirty songs, fifteen of which I don't like. With the volume of songs they're putting out, I am at least partially interested in something at least every week, and it helps to keep the game fresh.
DLC could be used in more consumer-friendly ways, too: why buy Madden 2009 for sixty bucks, when you could download the 2009 rosters for 1200 points, or 80 points a team or something, and "patch" your game with that new content? (Of course, the argument works the other way for that one--the revenue stream is the hard copy disks for full price with annual team changes).
Nintendo has done some great, innovative, industry changing things with the Wii; but their resistant to online capabilities is baffling.