You may only be able to afford one launch title with your Playstation Move peripheral, but it looks like Sony are providing enough retro-active support to ensure you'll have something else to use with your Move controller. Be it flower, Resident Evil 5 or High Velocity Bowling.
One other game that will be getting Move support ahead of time, is this Spring's launch from Zen Studios - Planet Minigolf. The game will be "fully compatible" with the Playstation Move come the controllers Fall launch.
Planet Minigolf looks set to be one of the best PSN releases this year, with online multiplayer and a level editor. Plus it's from Zen Studios, so it can't be bad. Right?