Last Week, Jay Hathaway from pheedcontent.com says (in AIM for iPhone: now with push notifications) Now that version 3.0 of the iPhone operating system allows third-party apps to take advantage of push notifications, we're starting to see some of the first major push apps popping up. AIM for iPhone, available as a free ad-supported app or a $2.99 ad-free version, now offers push notificat...

And InformationWeek says (in Apple Approves First Push-Notification Apps) Push-notification system enables apps to gain a user's attention without killing iPhone and iPod Touch system resources.

And pheedcontent.com says (in Product News: AIM, BeejiveIM Add Push Support) AIM and BeejiveIM, two popular instant messaging clients for the iPhone and iPod touch, have been updated with support for iPhone OS 3.0 Push notifications. The updates alert users when new messages arrive even if the applications aren't active.