My Pre is reporting that a tipster with a webOS emulator has found that the Pre will use IMAP IDLE. This means that users on GMail will have near instantaneous reception of new emails. Because it’s getting pushed to the phone from the GMail servers.

Pre users are going to love that. At the moment, the only phone to support GMail push is the G1 (and soon the HTC Magic or any other Android device). Palm’s relationship with Google is proving to be extremely awesome for Pre users.

On the heels of RIM adding a push API, Google is enabling some BlackBerry users to get their Gmail and Google Calendar stuff on their handsets. Don’t jump for joy just yet. There are some shortcomings that limit its usefulness. Like the fact that users have to be connecting to BlackBerry Enterprise Server instances, and those instances have to be backed by Microsoft Exchange.

Also, only 250 users per Enterprise Server instance can get their mobile Gmail on, changes made to appointments on a handset cannot be pushed back to Google Calendar. Plus, searching for Gmail messages still requires a separate app. Updates and improvements are on the way, but until then this is what you get.