I'm using Jira for issue tracking and would like to be able to write issue descriptions and comments using Markdown. Is there a way to do that? If not Markdown, wiki syntax, Textile, whatever -- just a way to get some mild html formatting into the page.
FWIW, something with a live preview, like SO would be great, but I'm really talking about on the rendering side. (Obviously, I can type all the Markdown I want :)