I am a freelance programmer with about 12 years proffesional programming experience. I have been using PHP for about 5 years and have seen PHP mature into what it is today.
What impressed me about Tikiwiki was that it had rich features and a good design.
My other programming skills include C, C++, Java, Perl and a bit of Python.
I have a Blog (using Tikiwiki of course) at http://www.lintrix.net/~aw/
I have some thoughts about a new module perhaps called DatabaseModuleDev.
I have also created a small Whois module for doing domain name look ups.