Since openSUSE 11.0 has just gone gold, Stefan Dirsch has created NVIDIA RPMs for openSUSE 11.0, so they are now all available via 1-Click-Install. See the wiki page for the link and details (it’s the same YMP for openSUSE 10.3).
The repository also appears in the community repository list, so you can add it by going to YaST -> Software -> Software Management. Then, in the menu: Repositories -> Repository Manager. Now hit the Add -> Community Repositories and select it from there.