Well the Server side elements of 'push' email with Exchange 2003 are now available.   The next major step is for devices to become available with the Messaging and Security Feature Pack integrated into ROM.  This is dependant on how quickly the OEMs integrate and test as well as getting through Mobile Operator testing - hopefully very soon!

Customers who already have Exchange Server 2003, can now download SP2 as a free upgrade from the Microsoft Download Center:

http://www.microsoft.com/exchange/downloads/2003/sp2/download.mspx

 
For more information about Exchange Server 2003 SP2, visit

http://www.microsoft.com/exchange/downloads/2003/sp2/default.mspx where you will find fact sheet on the solutions.

Obviously there is more in SP2 than just Direct Push Email so take a look at the release notes.

http://support.microsoft.com/kb/906669

There is also a list of all the issues that were fixed in SP2 here...

http://support.microsoft.com/kb/906671