In other ridiculous-Rock-Band-deal news, apparently Old Navy has jumped firmly onto the Rock Bandwagon. Not only have they debuted a series of Rock Band-themed shirts, but according to Joystiq they’re preparing to offer a free copy of Lego Rock Band with a twenty dollar purchase on “Black Friday,” the day after Thanksgiving. In case math isn’t your strong suit, that is a savings of thirty dollars.

The speculation is that it may be just a demo, but it’s certainly within the realm of possibility that they’d be giving out the full game — in a cheap cardboard sleeve without the fancy packaging, perhaps?

If that doesn’t get you interested, check out this quote from the article:

…Old Navy will also be selling Rock Band 2 bundles, and giving away guitar controllers with said bundles…

So wait: RB2 bundle with an extra guitar? This is insanity!

Update: In the comments, peter let us know that he called Old Navy headquarters, and the LRB disc will apparently be a demo. Not terribly surprising, but it’s good to have confirmation. Thanks, peter.

Update 2: OK, apparently that’s not right either. TV spots are now airing for this promo and they’re saying nothing about a demo, which I think they’d have to in the fine print. What they do say is that “supplies are extremely limited” and that the game will be given out on a first-come, first-served basis. I’ve put in a call to Old Navy’s media relations but have yet to hear back. In the meantime, we should probably assume that if you want yourself a free Lego Rock Band, you’ll want to show up very early.

[Read, via RockBandAide]