Hopefully that wasn't a surprise.

A. Suspend/resume - Your handheld will now maintain its IP address when the screen is off and during phone calls. When you activate the screen again or end a phone call you will no longer have to initiate a GPRS connection in order send and receive data.
B. Closing a GPRS connection - To close an active data connection hold down the red end key until the Data Connected icon in the Start bar reverts to the signal strenght indicator (approximately 5 seconds).
C. Today theme - The default Today theme has been updated to the default Windows Mobile 2003 theme
D. T-Mobile My E-mail - Your handheld now comes pre-loaded with a link on the Today page and a link in Internet Explorer’s Favorite’s folder to set up the T-Mobile My E-mail service. This service will allow you to get your work (Exchange, Lotus) and personal POP3 e-mail wirelessly through Pocket Inbox.
E. PowerPoint viewer - Westtek ClearVue Presentation Viewer is now bundled on your handheld.
F. PDF viewer - Westtek ClearVue PDF Viewer is now bundled on your handheld.
G. Updated VPN - Support for IPSec/L2TP now included.
H. Phone mute - Phone dialer now offers mute function.
I. Auto-suggest of e-mail addresses in To:, CC: and Bcc: fields
J. Auto-correct automatically fixes common spelling errors as you type
K. Pocket Inbox now supports SSL for IMAP and POP3 accounts
L. Windows Media Player 9 - Supports WMP v9 audio and video codecs. Improved play list management and support for Windows XP Plus! Photo Story.
M. Pocket Internet Explorer home page - The default home page has been updated to a new T-Mobile page.
N. Enhanced Pocket Internet Explorer support for other standards - Support for XHTML Basic, CSS and Jscript 5.5.
O. Improved connectivity user interface - Connection manager UI has been simplified. Connection status now available by tapping on signal strengh indicator.
P. Dual volume control - Phone and PDA volume can now be adjusted indepedently by tapping on the volume icon in the Start bar.
Q. Richer ringtone support - Supports MIDI and Windows Media Audio format ringtones.
R. Quick contacts search - Entering the beginning of a first or last name in Contact’s search box will progressively display those contacts whose name matches.
S. Signature support - Users can append signatures to outgoing messages. Users can assign signature by account.
T. Updated Inbox plugin for Today page - Tapping on an account name on the Inbox plugin will automatically take the user to that account.
U. Improved SMS integration - Inbox will look for the phone number on an incoming SMS in the Contacts database and display the sender’s name if there is a match. An option to call back the sender of an SMS has been added to the SMS notification screen and to Inbox. The SMS account in Inbox is now available when the radio is off-line.
V. IPv6 - Supports mixed IPv6/IPv4 environments.
W. Jawbreaker - New game.