Microsoft Office Communicator Web Access has been released

"OWA" for Live Communications Server 2005 SP1 has been released to the web. It's an interesting product that support for example external users and those whose platforms aren't supported by Office Communicator (E.g. Windows 2000) and it contains the following features -

Web access – Users can access the IM and presence features in Live Communications Server 2005 SP1 through any supported Web browser.
Presence – Communicator Web Access users can determine the status of other SIP users and update their own presence information.
Personal notes – A user can publish a personal note that is displayed along with the user’s presence information.
Extensive contact management – Users can add contacts to a contact list, tag contacts to be notified when those contacts’ presence status changes, and organize listed contacts into groups.
Federation – When federation is enabled in Microsoft Office Live Communications Server 2005 with SP1, Communicator Web Access users can view the presence of users in external organizations and send instant messages to those users.
Multiple browser and operating system support – Users with Windows-based and non-Windows-based browsers and operating systems can use Communicator Web Access

User search – The Communicator Web Access server connects to the Microsoft Active Directory® directory service. Unlike Communicator, however, Communicator Web Access does not query the Live Communications Server Address Book.