The way stack exchange sites seem to work is that if you get keen experts/enthusiasts in early you end up with a fun and immersive community. I am pretty active on the security, music, mechanics and audio-video production sites and the variations do seem to be around that initial core.
Any interest in
http://area51.stackexchange.com/proposals/40020/robotics
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock