Hey Pru!

In Por Ylem 3 www.inporylem.com is going to launch in December.
Pros: Very high server population expected, probably several RP guilds, no mounts.
Cons: Default map is too big, red stat loss when killed by a paladin.

Requiem 2 www.13thrones.com is also going to launch in December.
Pros: RP focused server, extreme customization in every aspect of the game (more than anything I've seen anywhere!), small map means more player interaction, possibility of perma-death in certain situations.
Cons: Only a medium server population expected, and some people don't like RP-only servers.

UO Forever www.uoforever.com has been open for a while now.
Pros: Decent server population.
Cons: Oversized map, mounts but no bolas, temporary stat loss for murderers, population is in decline.

*All opinions above are my own, but I like to think they are shared among most members.