We have recently updated the way that messages are displayed when clicking on a subject link.
Instead of taking you to just that message we use jQuery and jQuery UI to override the method and display a window (which is movable and resizable) that contains the message content.
We have put together a proof of concept article for how this was done.
As always feel free to report any issues to us by replying to this message or emailing bvstone@bvstools.com directly.
Thanks!
Brad