We were disappointed a few weeks ago when we learned that the PSP Go wouldn't come bundled with Rock Band Unplugged as we'd heard, but rather a "voucher" for an exclusive demo of the title. We then wondered why you would need a voucher for a demo.
PlayStation.Blog has answered our questions, revealing one very important, kind of awesome detail about the PSP Go Rock Band Unplugged Lite: not only will it come loaded with five songs, it will accept downloads from the Rock Band Unplugged store, effectively allowing players to build a track list a la carte. It's a nice bonus that extends the allure of the demo (good for PSP Go buyers) and encourages DLC purchases (good for MTV, Harmonix, EA, etc.)