If you get a pm from another member, is there any way to search his screenname to see what reviews he has posted?  

I don't think pms is contagious

Sorry, couldn't resist! Yes, click the Reviews tab, then under Search"(which is just under the tabs), select "Search by Reviewers".

Click the Reviews tab. Then click the Search link, and click "Search by Reviewers" on the drop down list. Type in the handle from the PM.

Thanks for the help, and I certainly hope pms isn't contagious