Ok, well my own custom markup language is just about done. The parser weighs in at under 200 lines, and will hopefully be smaller once I clean it up. I'll probably put it on my software page once it's done so anyone can benefit. Once it's done I can finally use it for things like my weblog posts, and an article I've been wanting to write.
I'll have to do some timing to see how slow the thing is though. Lots of regular expressions, but it only makes one pass over its input (besides a potential one line "peek").
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