i'm currently in the process of testing the pineapple firmware on the carambola 2, which has double the RAM and flash of the current pineapple IV.
more info on the board can be found here: http://8devices.com/carambola-2
the best thing about it is the size. it's small enough to fit in your pocket with an enclosure and antenna, and uses a fraction of the power that the pineapple IV does. i've had one connected to a LiPo battery without recharging for about a week, whereas the pineapple IV drained it in less than 36 hours. unfortunately i don't have any time to work on this, as the board belongs to someone at my local hackerspace, but i can recommend the board to anyone who's interested in messing with a board with higher specs.