Neo FreeRunner has USB OTG, quite sensitive screen and IMO a bit more precise GPS (but getting a cold lock takes quite a time). Most Neo distros also have a rolling release (no "where is PR X.Y ???" threads ), recent package versions (Python 2.6, kernel 2.6.34 with KMS, new Enlightnment libraries) and pretty much everything is open source. Well, even the hardware (complete schematics for everything are available) so there are quite a few hw mods. Like a navigation board that adds a 3D digital gyroscope, a magnetometer and a pressure sensor FreeRunner has been also send to space, twice.

But there are severe usability issues, as mentioned earlier. They are also unlikely to be completely solved, as FreeRunner users switch to more modern (and usable ) devices.