I've just put together a prototype Sherlock channel for APOLLO. Easy peasy tool to write (actually, 99% of it is the default Sherlock channel template file, with a couple of minor tweaks.
This is starting to feel much more useful (to me, anyway). An all-in-one application interface for searching and viewing learning objects.
Next, I want to complete the tool to use a SOAP interface (rather than the DOM-based screen-scraping it's using now) so I can have a little more control over what gets sent where. Sherlock made the screen-scraping version much easier than the SOAP version, though...
(click on image for bigger version)