yesterday was Fedora 18 release day. ;) Grab it while it's hot... http://fedoraproject.org/get-fedora-all Overall release day went very smoothly. We did run into 2 minor issues:

• The instrepo in mirrormanager for fedup (the new upgrade tool) wasn't working in the early parts of the morning after release. Matt Domsch (our wonderful mirrormanager maintainer) got in and fixed it up, and it was working before midday. 
• There was a docs issue with pushing various guides, but that got fixed up thanks to the power of git.

Our master mirrors have been handling the load just fine, I think partly because we had so large a pool of other mirrors with content at release time. Anyhow, if you haven't had a chance, go check out Fedora 18 today. :)