The rumor mill has been working overtime lately with respect to Apple's .Mac service. In my experience this has been one of the most controversial Apple products in the last few years. Some people swear by it while others seem to hate it. For my part, I find it very useful but probably overpriced. Of particular note are the recent rumors that with the iPhone 2.0 software, .Mac is going to start pushing email, calendar and contact data to our iPhones. I don't like to get hung up on rumors but let me just go on record to say that is something I've been lusting after for some time now. I generally sync my iPhone to the MacBook Pro but that usually stays at my desk at home while the MacBook Air follows me around during the week. Even though my calendars are synced (via BusySync) and contacts are synced via .Mac, if I sync the calendar and contact data on the iPhone on both Macs, inevitably things start hiccuping. I would much prefer that stuff (which are very small data packets) just show up on my phone and forego that type of wired syncing altogether.
This would also be fantastic for families and small businesses that don't need an Enterprise but still need the convenience of push syncing. I'm crossing my fingers that this rumor comes true.