Sequel to my fave psp game of 2009 was announced today:
http://www.andriasang.com/e/blog/2010/12/15/flying_get/
Scheduled for a 2011 release. I'm hoping it's Spring rather than Summer or Fall.
Magazine pics:
http://www.the-magicbox.com/1012/game101214d.shtml
Amiami has it up for preorder, and lists it as a late July release:
http://www.amiami.jp/shop/?set=english&vgForm=ProductInfo&sku=TVG-PSP-1880&template=default/product/e_display.html