During MÃƒÂ¶bius conference last week, Microsoft previewed the Pocket PC client of its Communicator 2005 service which is using and interacting with Microsoft's Live Communication Server solution.
Communicator 2005 is an integrated communications client, enabling information workers to communicate in real time. As the recommended client for Microsoft Office Live Communications Server 2005, Communicator 2005 integrates with Microsoft Office System applications and enterprise telephony infrastructure.
Basically, Live Communications Server 2005 is the business version of the well known MSN Messenger but unlike MSN Messenger it runs within a corporate environment and offers way more (ad-free) features. It delivers instant messaging and presence as part of a scalable, enterprise-grade solution offering enhanced security, seamless integration with other Microsoft products and an extensible, industry-standard development platform.
So with Communicator for Windows Mobile, you can follow your contacts, whether they are online or offline and if they are online you can have a chat via IM or you can call them via the PSTN, right from your Pocket PC Phone Edition or - and that's interesting - via VoIP.
Unfortunately, the Windows Mobile client isn't supporting video communication capabilities as the desktop version supports, even if the 3G networks would be good enough to handle this (not to mention that most Pocket PCs have W-LAN support today) as well as the HTC Universal would be the perfect device for it due to its second video cam which is normally used for UMTS video calls.
Microsoft hasn't given a release date yet but if you are interested in Office Communicator for Windows Mobile, you should ask your Microsoft rep.
Cheers ~ Arne