64bit-ness has little to do with modernity, the 64bit and 32bit flavours are maintained in parallel, and in fact up until quite recently you'd have to forgo many closed source apps/plugins (e.g. flash) if you were running a 64bit Linux.

Yes, OMAP2 is 32bit, as is OMAP3 afaik.

The OMAP2420 in the N8x0 machines has 3D/2D video hardware acceleration, but we lack drivers, and therefore the UI is not written to use acceleration.