It was a little slow to load for me, but you're probably getting hammered :)
Very nice layout! I've dabbled a bit in web based apps myself (I'm a sysadmin, and wanted some visual front end for some PShell/Bash scripts I've got running) and can never get a good look and feel like you've got here. Not artistic at all.
For suggestions, how are you doing your dynamic loading? XHR? Would you consider some sort of loading response between requesting the content and receiving the content, so that the user isn't looking at empty boxes?
Great work mate. Glad your experiment is getting such exposure.