I have a powerbook 12" Mac OS X 10.3.9 - Panther. havent yet upgraded to tiger. Overall very good experience. Its really fast and very convenient not to have wires hanging around. Keep the phone in my pocket and surf as if i have a wifi connection
Speeds are good - same as with a wire I guess. Havent really checked. But i get downloads at about 7 - 10 kbps
I also use it with my palm zire 72 to connect - surf and check email on the move. very convenient. worth the money if you ask me.
jgd
kashi