Most common bbtags are supported, and with cbparser's InfiniTags™ you can pretty much just make up
tags as you go along. If cbparser can construct valid xhtml tags out of them, it will. Experimentation is the key, and preview often.
A few bbcode
[url="http://foo.com" title="foo!"]foo U!
To post code with indentation and/or strange characters, use [pre][/pre] tags.