DVDmote allows you to control the DVD player and Front Row applications on your Macintosh computer, using your iPhone or iPod Touch as a remote control.
DVDmote is available on the App Store for $1.99 (USD) -- download it using iTunes or the App Store icon on your iPhone or iPod Touch.
DVDmote connects to your computer using the DVDmoteService application, which is available as a free download. Note that DVDmoteService requires Mac OS X 10.5 (Leopard).
Check out the Getting Started guide for quick and easy instructions to start using DVDmote!