Manuel Lemos has made a 4 hour video tutorial for his popular PHP Forms Generation and Validation class. Thankfully Google Video has a download link so you can watch it when you want. PHP Classes has quite a few other nice classes on their site, however the site is kind of confusing to use. Basically you have to register (which is free), then login and then pick what server to use (they balance their servers by doing this) then you can get whatever files you want. Anyone willing to make that long a tutorial is pretty cool in my book. 
I haven’t used this yet, but it looks interesting.
errm, where is the code? the link jsut go back and forth to each other?