hey dave, dont diss our efforts over there! ill admit it seems sorta pointless but NOTHING beats the real thing when it comes down to it, i love my 2x but i still build portables, its fun and you can learn alot of stuff while doing it.
and about making a sega genesis portable, i could build one with a 5 inch lcd, good controlls and a nice case and have it less than 8x6x2 inches and have longer battery life than the 2x on 2200mah batteries. it would be a bit larger but nearly as cool! plus building a genesis portable woudl actually be cheaper than buying a 2x! i could build one for less than 100$