With Apple Remote for iPhone and iPod Touch you control iTunes on a remote computer.
What I only recently found out is that Apple Remote acts as a Wake-On-LAN (WOL) client. At least it does that in my environment. My Mac Mini wakes up from sleep when I start Apple Remote on the iPod Touch and have it try to connect to iTunes on the Mac Mini.
I find this a little odd because none of the articles I found (App Store and apple.com) mention this feature. Of course I’m happy about it nonetheless.