On Friday night, Twonky released a beta for their new TwonkyMedia Server 6.0 release, bringing with it a number of new features, including aggregation.
Release notes for TMS 6.0
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New in Version 6.0:
+ aggregation of TMS and WMC servers
+ auto update for PC versions
+ file system eventing support for MAC
+ time seek support for MPEG, WMA and WMV content
+ active connections info on status page
+ animated tray icon on Win32
+ wpl playlists can contain URLs to Internet content (radio, pictures, video)
+ can now handle albumart art that has the same file name as a music or video file, but file extension is jpg,
e.g. mymovie.mpg can have albumart file mymovie.jpg (make sure than the scanner filter is set to video only)
Changes:
o Improved URLs with fixed schema for scaling
o Improved playlist handling, enabled upload of wpl playlists
You can download the beta here: http://www.twonkyforum.com/downloads/6.0-Beta/
There is also a page you can visit to learn more here: http://www.twonkyforum.com/viewtopic.php?f=16&t=8016&start=0

I'm going to try and hack the Flash part into the HP 3.0 software. The UI is nicer that MediaStreamer.