Linkshell Search

[Radaghast]

I'd say it'd probably depend on what you're looking for (social, raiding, crafting, etc). Vynala had a great reference thread over on Eorzeapedia that might be useful:

http://www.eorzeapedia.com/forums/vi...p?f=78&t=10161

The forums really aren't very active due to the low population, but it's a good place to start.