Besides the illegalness, it's a different kernel version and more important a different powervr chip. The N8x0 tablets have an OMAP2420 with a PowerVR MBX, while the Pandora has an OMAP3530 with a PowerVR SGX. For the Pandora the kernel drivers are open source and provide access to the chip for closed source userspace GLES libraries.

This is of course, AFAIK. YMMV. no warranty and all that other stuff. :P

-John