I just finished installing WebYast on a SLES 11 virtual machine and so far I like it. It is a wonderful Ruby based application that very extendable.
A web client of YaST is something the SUSE distro has need for sometime in my opinion. This has a lot of potential, I would like to be able to one day use a single YaST client, web or fat, to manage several SUSE servers, whether they are SLE or openSUSE. Novell has a good tool to manage multiple Linux servers Zenworks Linux Management, but for those small scale server deployments I would rather have a good open source solution rather then pay the money for Zenworks.
Screenshot of WebYast and to follow.