I didn't know about the VirusTotal option either - that's a pretty cool feature! I especially like how you can go into the Options menu and have it turned on for all processes, and then submit any files Virus Total doesn't recognize as a batch.
I found it rather interesting to see some of the items that got flagged by some of the VirusTotal scanners. (Well, just one scanner really.)
The Verified Signer column is also a cool feature I hadn't come across yet. For as long as I've been using Process Explorer, I'm a little surprised at some of the things I never realized it could do.