Thsi is the stuff that they went over during the guidl features portion of the guidl summit,m via live stream on the SWTOR website.
Guild Banks: 7 tabs (each costing more), some tabs can be set to use authenticators, fully customizable by guild leaders, transaction details, member allowances for gear repairs
Post 1.2 (in no particular order)
Guild Emblem (placed on armor somewhere)
Guild Advertising, find or join guilds
Guild Capital Ships
Guild tab to show member's crafting skills
Guild Taxation (possible, but no eta)
now to see how it will work out.