Yum NFS support

Hello,
that has been discussed probably before but I just saw the BZ:
https://devel.linux.duke.edu/bugzilla/show_bug.cgi?id=678

What is the status of NFS support for yum ?

I was thinking of implementing this with a plugin that will detect a 
nfs:// url, mount the repository to a temporary directory and replace 
the url with file:// one. Then proceed as usual and unmount.
However I can't find a way to change the repo url in a plugin because 
the parser will barf on nfs:// url.

Any thoughts on the topic?

Thanks,
Alexander.