Halfbrick Studios has several upcoming minis in development for the PSP. The EU Playstation blog featured a post highlighting Halfbrick and taking a look at some of the minis they are developing. They all seem to be interesting and I'm hoping Chris will get to preview them before they're released and share his thoughts on them.
http://blog.eu.playstation.com/2009/10/02/minis-week-halfbrick-studios/