1. What expansion is this server up too?
We are a custom server, not a straight emulator. As such we use whatever zones we want, attached to different areas. Most of Pre-Kunark is used, Many/Most PoP zones are used. Luclin exploded, but we still use a couple of its zones. Kunark as a whole was just released but its 55+ if you're being generous. Many LDON's are used, but they aren't instances. At least one 'Omens of War' zone is also active.
2. Is this a PVP server?
No. You can flag, but you are in the minority. PvP is not something we bother to balance here or spend much time considering, and the sad truth is most of our population prefers it that way.
3. Are most players high end at this point?
We are probably pretty top heavy. That being said we have a healthy enough population that if you want to group up to 65, you can usually always do so. Unless you play at very odd times. You are also allowed to 2 box (from different account, but NEVER more than 2), which can help fill the groupless gaps if they occur.
4. What classes are most guilds short on?
Needs vary constantly. Tanks are usually not needed by raiding guilds, but everything else usually has some need by someone.
Your first question infers you may not quite understand what we are about, I'd suggest checking out our wiki,
specifically this page. In short, we emulate the feel of live, around Velious era, with zones past that. Consider us more like a mod to live, rather than a clone of it.