Editing:

• The GUI editor does not like Safari very much, but I've had no problems with Firefox.
• to create pretty code, insert the code in text mode surrounded by curly brackets and a shebang:

{{{#!highlight [code type]

[code here]

}}}

• I've been using nasm as the code type, but there might be a better one. Go here for moinmoin details and go here for the highlighter page, pygments