I came across a perl-based wiki and it has an interesting feature which you can see here:
http://mojomojo.org/advocacy#Live.2C_as_you_type.2C_preview
Is there something like that in dokuwiki? Maybe this is just my wish ;-)
This is a good resource (
http://usability.wikimedia.org/wiki/Usability_and_Experience_Study) to consider about the wish I made . ;-)