Sorry to ask, I know I keep putting on you, but I don't have anyone else to ask :(
Have just create a new contact form extension that runs through a specialpage, is still in the developement process at the moment so excuse the look, still a few bits to tidy up as yet. The reason I ask if you can have a look is that I'm concerned there might be a security isue with it? Not sure how mediawiki works in that respect or hackers for that matter, you'll find the page here.
Cheers, Lee