[CentOS] Problem with yum after upgrading from 4.5 to 5.0

Hello,

Have pretty much figured out I can't use plugins since upgrading.  If I use
yum update --noplugins to get the updates for 5.0, I get:

Warning: rpmts_HdrFromFdno: Header V# DSA signature: NOKEY, key ID e8562897

Public key for samba-common-3.0.23c-2.el5.2.0.2.i386.rpm is not installed

I looked back through the archives and think I may need a rpmforge-release
key but have not been able to find it.  Is this right?  Anyone have a link
for it?

TIA