For info (remember, we like lists…) , and to save people the problems I seem to have had over the last 24 hours or so the following are an excellent place to start adding repositories to YaST:

• http://ftp.gwdg.de/pub/linux/misc/suser-guru/rpm/10.0/
• http://ftp.opensuse.org/pub/opensuse/distribution/SL-10.0-OSS/inst-source/

(if you use a version of suse other than 10.0 ammend the number as appropriate)

A big list is available at:

• http://en.opensuse.org/Additional_YaST_Package_Repositories

When it comes to updating YaST the fastest way to do this is by entering:

installation_sources -a your source url

And then wait for it to do its thing.

If you know of any other places worth using please let me know.