I received my Treo 600 yesterday. One of the biggest concerns of mine is not so much missing a call while using data, but not getting voicemail notification quickly while surfing. It appears to me in my extremely limited use that voicemail notifications are sent immediately. In a few tests I've ran with my girlfriend, she'll get sent directly to voicemail, and I'll get the notification seconds after she leaves one. Is this the experience everyone else is having? It's an important issue for me because I'm an airline pilot on call and it's required I return any missed calls from my company within 15 minutes.