I'm on the server, but not in the XFOR guild yet since I didn't get my application in until late last month. I just started playing a day or two ago, and have so far only gotten to Level 3. I can only play for an hour or so a day and I'm new to the MMORPG world, so it'll be slow-going for me.
Once the guild opens back up in a few weeks, hopefully I'll get accepted. I'm playing a Sith Warrior.
On another note, it looks like there will be another guild opening up on another server, this one being set up by Bioware exclusively for 501st members - it will be called the "501st Legion" and we may be able to use our TKIDs as character names. Can't wait.