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I've just discovered a cool little tool called [Textile](http://textism.com/tools/textile/index.html) over at Textism. It allows you to type in a reasonably natural way and will format certain character combinations in certain ways. for example, putting underscores around a section **makes that section italic** and so on for lots of cool formatting goodness. I have some of the stuff working with regular expressions in my site now, but the formatting commands used in Textile have given me some more ideas for other things to add!