After years of ongoing efforts it's usable now.
It's a java desktop-application, that displays cached images of hygrid and gridcosm. This way you will loose some disc-space and get fast synergy-browsing.
I've done a windows- and OS-X-version in addition to the pure java-version.
Active/New discussions on SITO have been moved to Google Groups.
Please check out the
topics over there.