Well, after a lot of bitterness and anger over the demo fiasco, all those worries have fizzed away, along with the news of Patapon's release in Europe. Patapon will be released in Europe on the 22nd February 2008 (that's just a few days before the US gets it) and SCEE gave us an extra surprise by telling us that the demo of the game, featuring a rare weapon that can be brought to the full game, will be released on the PSP Store the day before!
So, the only gripe is that we're getting charged over the top for it, and it's not available to pre-order in many places. Don't let that stop you getting the free demo at least though!
Source: Eurogamer (demo), Eurogamer (release date)