Added City profile field and Twitter module, use BBCode or something else?

I added a profile field for "City" so people can add where they live and make it easy to find people. You can fill it out by going to "My Account" and then hitting Personal Info and hitting edit.

I also enabled the Twitter module. It's also under My Account and twitter info, where you can add your account. The website will suck in your posts.

We'll create a public feed of Twitter posts -- likely those tagged with either #uug or #unity3D (staying from just saying 'Unity' -- you get a bunch of church posts).

Lastly -- I've got BBCode formatting enabled for the forums. I'm not sure that this is the best / easiest - there are some other non-HTML formats that I can use. What do people use in other forums? What do you want?