Buying Bitcoin's is an mission and a half. Either the particular solution for the trader is non-obvious or requires a huge amount of effort.
well, it is a mission because bitcoin is a very hard currency, while most of the popular means of transferring national fiat currency (e.g., paypal) are very soft (chargebacks). thus, it requires a lot of trust on the part of the bitcoin seller. which of course presents a problem to the potential bitcoin buyer.
Write a 'Trading Guide' explaining the best practices for trading Bitcoin
http://wiki.bitcoin-otc.com/wiki/Using_bitcoin-otc already has some good content to start with, though some of it is OTC specific, other (about safety and chargebacks) is not.
Make Bitcoin-OTC easier to use
it is already easy to use - click on the webchat link, and ask in channel if anyone's selling. of course, the problem is that most newbies want to buy for paypal and some such, which brings us to the trust issue as above. regardless of the mechanism of OTC registration (admittedly pgp is probably not too newbie-friendly), getting trust takes time, so with online p2p trading, nobody can expect to come in and start buying large quantities of bitcoin with soft payment methods.
Moderate the marketplace forum more strictly, enforce well formed titles and styles
do you volunteer?

Develop a backbone of international Bitcoin traders
if you have any ideas that could be used on OTC, i'd be glad to hear them.
