The website for DeepZoomPublisher.com is now 'live', although Publisher itself isn't quite finished yet. In the interim, I've uploaded Tag Updater which is a much simpler tool to extract metadata from JPGs and make it 'accessible' within a Silverlight 2.0/Deep Zoom application.
Tag Updater is based on this Filtering by Tag Sample and these previous posts. An example of the 'output' from Tag Updater can be viewed here
Also, Deep Zoom Composer can now stitch panoramas!.
In unrelated news, Geoquery 2008 examples have also been updated.