This is the sixth keyboard that I've purchased from logitech, they're great. I used to buy them for their programmability, one button to ON_OFF, email, browser, music, photos..... for those folks who had trouble finding applications. This one is for personal use. My order has been in for months, waiting for the release, waiting for the software. Finally as of Nov 26th it's ready!!!
I sent my last programmed logitech Media Center to California with the IMac DV and had to use the Apple OEM while waiting for the Wave to be released. I like MS's curved keyboard OK, but the action and palm support is not as good as the logitech line.
Some folks have had software trouble but I have not, neither in OS9, jaguar, panther or tiger. Leopard is another story, though the new LMC 2.4.0 software is Leopard compatible.