You've waited patiently enough! Here are the trailers for Patapon 2 and Loco Roco 2 from Tokyo Game Show 2008. This should bring a smile to your face!
There are actually 2 trailers for Patapon 2 but I've only embedded one. You can watch the other one here (slight spoilers for Patapon!).
Some more information on Patapon 2. It will (according to Joystiq) have double the levels, almost triple the items and it will include a multiplayer mode which can be done either using ad-hoc or using the PSP's game sharing feature! So you only need to own one copy of the game!