Apple introduces MobileMe for the iPhione which is push email for your iPhone, iPod Touch, Mac, and PC.  Except that it pushes much more than just your e-mail.  But first for those who may not know what push e-mail is. 

Push e-mail is used to describe e-mail systems that provide an "always-on" capability, in which new e-mail is instantly and actively transferred (pushed) as it arrives by the mail delivery agent (MDA) (commonly called mail server) to the mail user agent (MUA), also called the e-mail client. Most of today's clients are smart phones.

The best way to describe Apple's new MobileMe is that all of your information (e-mail, contacts, calendar, photo's, and files) goes where you go.  It's Microsoft Exchange 'Apple style'.  Which is code word for 20 times better. 

It all goes where you go.

Maybe you have a computer at home, one at work, and an iPhone or iPod touch. And it can be hard to keep them all up to date. But now there’s MobileMe. Wherever you are, your iPhone, iPod touch, Mac, and PC are always current and always in sync. And with a suite of elegant new web applications, you can access your data from anywhere.

Push email. Push contacts. Push calendar.

MobileMe stores all your email, contacts, and calendars on an online server — or “cloud” — and pushes them down to your iPhone, iPod touch, Mac, and PC. When you make a change on one device, the cloud updates the others. Push happens automatically, instantly, and continuously. You don’t have to wait for it or remember to do anything — such as docking your iPhone and syncing manually — to stay up to date.

Works with the native applications you know.

Do everything you need to do on every device you own. MobileMe works with Mail, Address Book, and iCal on a Mac; Microsoft Outlook on a PC with Windows XP or Vista; and the built-in applications on your iPhone or iPod touch.

Watch the guided tour.