I am somewhat familiar with the PACS situation (quick summary: frustrating as hell if you're used to open/commodity style technologies).

I was about to suggest some kind of plugin for OsiriX, but then I looked in your Help section and saw that one is already in the works...

What is needed is more open source options for PACS, especially servers, and your service may play a role in making things reasonable. OsiriX is very nice but unfortunately OS X only.

Also, it might be interesting to integrate this with remote image reading applications used by consulting/remote radiologists, since the images will already be "in the cloud".