BlackBoard

Anyone seen this one yet?  I stumbled across it today...
http://blackboard.unclassified.de/

Appears to be very new...

Main feature is that it's designed from ground up to have native Jabber IM notification for replies and new topics.  The interface looks very pleasing, and supposedly has full XHTML and CSS compliance.  A lot of features out of the box too - access rights, polls, attachments, bbcode buttons, and the download is only approx 550KB.

Feature list (taken from their main page):
    *  Native Jabber IM notification
    * Very powerful access rights management
    * Robust BB code parser with syntax checking and complete nesting tags support
    * Transparent and foreseeable read status of threads
    * Scalable solution ? database server and web servers can reside on separate   
    * Compatible with any operating system that supports PHP and MySQL
    * Almost completely automated installation, configuration in the integrated web-interface
    * In-place forums configuration, no special Admin CP needed for this
    * Intuitive usage: commands are where you expect them to be
    * Arbitrary nesting of forums or categories
    * Easy integration into present websites or a small layout
    * Full Unicode support, also in e-mails and notifications
    * E-Mail and Jabber notification on replies or new topics
    * Full ACL support on group/user and forum/thread level, users can be members of many groups
    * Multiple designs and languages
    * Cookie and URL-based sessions supported (works without cookies)
    * Freely customizable BBCode tags and user profile fields
    * Automatic GZip output compression
    * Post attachments, polls, bookmarks, statistics, ?pin?/move/split topics, user avatars and photos.....