Well, I'm still in game, in zone 777. Haven't been online as much as I used to, but that has little to do with Xsyon but all with the release of The Witcher.
I have to admit though that I'll likely cancel my subscription in the coming weeks. The game's moving towards more twitch combat and it just so happens that I do not like twitch combat - and certainly not in an MMORPG. *shrugs shoulders*
(That's not meant as a complaint about the combat system here, I'm aware that other people prefer twitch combat.)