I ran JKA (as it was known by the community) on my server for about a year, maybe less. It was really a dissapointment. The game wasn't too bad in and of itself, but you can get basically the same features from Outcast with JediPlus mod (the mod they copied the ideas from). *gets philosophical and rants about how the community destroyed itself...*
I've recently gone back and played JK2 with some friends of mine for old times' sake. I once had a pretty popular server back in the day, and it was probably one of the top games I really enjoyed playing online. Ah, the good ol' days.