Php Triad (get at www.download.com) This program will install Apache webserver, Php, and MySQL on your comp, in the C:\apache dir. Just run Apache.exe and type in http://your ip here (ex: http://127.0.0.1 )
You can also buy a domain name, and have it point to your IP (Static IP is a good idea for this one). VOILA! As many MYSQL databases you want, unlimited bandwith (dependant on ISP) and Unlimited disk space (as much as your comp can hold) PHP support, and I will also post an easy program for CGI
Threaded Mode