[Centos] yum stalls <?>

I just installed a fresh 3.3 system (because those are the ISO's I had on
hand).  Upon running yum update, it starts to download headers and then
stalls.  I hit Ctl-C and it continues to download about 4-5 more headers and
stalls.  I hit Ctl-C again and it pulls a few more headers.  Anyone seen
this and/or know how to fix it?

TIA

Mike