That is a SODIMM System on Module! Freedom Scientific seems to have used a modular architecture so the core system could be upgraded at a later date. From what I can tell, they later did so with the Omni series that has 128MB of ram.

Two screws secure the System on Module, and then we can remove it by releasing the latches to the sides.

Pulling off the thermal pads gives us a better look at the 400MHz Intel XScale processor, 64MB RAM, and system Flash.

Could swapping this module let you DIY the Omni upgrade? We'd need to do more testing, but it's a strong possibility.