At last week's MUUG meeting, during the round-table discussion, I mentioned some of the feature and problems I had encountered with Fedora 16. A couple people mentioned the fact that network device naming had changed.
Here's more about that in the Fedora 15 release notes, including suggested workarounds and a way to disable the feature entirely:
http://docs.fedoraproject.org/en-US/Fedora/15/html/Release_Notes/sect-Releas...