Xobni looks like a nice Outlook add-in. However, within a couple of hours of installing I was getting familiar with scanpst.exe . Coincidence?

I removed Xobni and no corrupt pst's since.

2008.05.14 UPDATE:

I determined that it was possible that I had an undetected corrupt ost file before the Xobni install. I'm giving it a whirl again.

2008.05.21 UPDATE:

So far, so good. No additional Outlook corruptions. The feature I like the most about Xobni is the quick access to the phone # for the sender and the list of files you've exchanged with them (and can click on to open).