on a side note, I'm in a star wars clan, dedicated to the SW games, and that was born specifically for XvT.
Now Xvt is almost dead but I played, well, A LOT with it in my clan and in the international tourneys.
Xvt has always been played a lot more than XWA, althought this one was far more recent.
The reason is simple: lag
xwa is almost unplayable online, it suffer of heavy lag if played in LAN too.
Xvt was far better, I said, but it still was very VERY laggy, and this is probably the strongest reason for its progressive death.
Once became clear that there weren't a new SW space sim coming soon I decided -with some friends at the very beginning- to start this thing, I learned modelling, texturing, modding, etc, and I continued just because I found it funny, like an hobby, but take in mind that if we'll have success in making a product with a feeling close to the official sw games and a decent multiplayer support, a lot of people may be interested.
I know that the netcode of FS2 isn't exactly the best possible, but nonetheless FS2 support dedicated servers (xvt and xwa could be played only with directplay) and, even more important, FS2 is open source, and this means a lot of possible improovments