PhP is annoying to learn, and there's quite a few tutorials that just tell you to copy-paste a block of code. It's quite cool to see the basics explained in a flash :) The intro was a bit long, especially if people want to look something up quickly (Sorry, had to nag ;)).
Most problems I had with PhP are server permissions and such, couldn't find anything about those? Ignore this line if they *are* within the flash, I didn't check everything ;)
Good job !