Just an FYI - I've seen in the official forums that a number of people have been suspended for transferring gold between characters or to friends, etc. (for example to buy a horse), and now it looks like a number of guild leaders have been suspended for sending out large numbers of mail (individually mailing each guild member regarding guild business). They're getting caught up in automated processes to screen for gold sellers and spammers, apparently, and it seems as though the suspension/ban process is automated as well (or close to it).
So if you're sending out a lot of mail, or transferring a lot of gold to friends or even between alts, be careful of this until they get it ironed out.