Profiles on blogger that list as an Interest...
Fuzion: 2 (Including the guy above.)
BESM (Tri-Stat): 12
So there you go. BESM/Tri-Stat is marginally more popular than Fuzion. (And it's interesting that more wimmin than men list it as an interest.) Traveller is over ten times more popular than either. And they all get crushed by the D&D juggernaut.
I still like Fuzion, and there's more than enough material online to run a decent science fiction/mecha game. But with Tri-Stat being a more complete free game and having more appeal to wimmin, and therefore a bigger potential audience, I think I've talked myself into focusing on using it for the near future. Unless I do the smart thing and just play Traveller...or drink the D&D Kool-Aid. "Magic Missile!"