I got the Keyspan DMR last march and it has worked great. in OS9 there is a standard app on the cd that lets you command any app, itunes, dvd, explorer, anything you want also you can costomize any key stroke.
IN OSX there you have to download a seperate app that is incompatabel with clasic mode, IE the remote become useless when running a classic app.
I mainly got it to use with the dvd player in my mac and it works fine. I would get the origianal DMR because it has way more buttons which has more uses. The range is good. I got it to about 25 feet and it still worked.