The Vita has three things against it. No price drop (prices are the same as the PlayStation 3) proprietary memory that's pricey, and a serious lack of games.
Samsung Galaxy Precedent (rooted, AreaRom 3.4 , sd-ext w/ 3.65GB internal space)
Kindle Fire (1st Gen, rooted, AOKP JB 4.1, Nova Launcher)
Samsung Galaxy SIII 4G LTE (rooted, Carbon ROM)