Noah couldn't have said it better - if you're looking for a phone that offers near immediate e-mail delivery, the BlackBerry is your best bet. On the heels of a potential Gmail application for the iPhone, RIM appears to be developing an enhanced Gmail plugin that will allow users to view, archive, search, activate labels, and more. Like the threaded, conversation-type format when you check your e-mail on the Gmail website? You're in luck. Supposedly, the new application will allow you to do the following:
At the moment, the program is only available to beta testers and employees. Though admission is unlikely, you can try and apply for a beta testing slot here. Give it a go and let us know your results!