Something that I think every guild leader is hoping for is huge guild houses, it would be great that you could design your own guild castle like a Lego set, though some funky interface. Anyways, that would give a nice original feeling to each guild\'s castle. They could be upgraded from a small fortress, to a large castle and up to maybe a citadel.
I like Fish\'s ideas about having a store front with an npc to do your selling. It would be nice, because it would make your house very popular and you\'d have alot of visitors, and perhaps you\'d give tips to newbies.
You could also make it a messaging center where people could drop off, or send items, payment for a job or service, or drop a line. Few of these are very complicated I think at least
And I would like to have a treehouse on a ridge overlooking the inner part of the stacilite. Yeah, that would be nice. :]