The website where Matt Stifler buys his video equipment, www.spychest.com is real and does in fact sell those items. The website has since then redirected to www.spytechs.com.
[22:08]Tad Hilgenbrink really bared it all in the scene where he undresses in front of the girls while playing the trivia game. He didn't inform the girls in advance, who were expecting him to keep his privates covered somehow, so their reaction is quite genuine.
This is the first time Matt Stifler is referred to by his first name. His appearance in the first two films were credited as Stifler's Little Bro.
The extra band members featured in the film were members of the band from Riverside Community College in Riverside, CA.
After the wild success of American Pie 2, producers originally wanted this project to be a Stifler spin-off/stand-alone starring Seann William Scott to follow American Wedding.