The Allegro Wiki is migrating to github at https://github.com/liballeg/allegro_wiki/wiki
Its mighty simple, just surround your bit of text with the <txt2img></txt2img> tag, ex:
<txt2img> Hello, I'm an image. </txt2img>
Comes out as: <txt2img> Hello, I'm an image. </txt2img>
You might want to post some contact details like IM or email addresses, but don't want spambots getting it, just use the txt2img tag, Tomasu does! You can too.
Note: Spam bots can click the "view source" link and see the original text :)