Original information about Chromium and my little repository here:
Today's build of chromium (well, technically yesterday's at this point) is built for both x86-32 and x86-64. If you were previously using chromium.i386 (or .i586 on F-11) and you want to use the native client, you'll need to run: yum remove chromium v8 , then, yum install chromium v8 will work. If you just run yum update, you'll keep getting the 32bit version.
There is still quite a bit of stuff that needs to be done before it can go into Fedora proper, but I'm making good progress.
Also, if you know of anyone who would like to hack on Python for Red Hat as their day job, please point them to me.