This installation has been done smoothly on SUSE 10 beta 2 (SUSE 10 is not out yet).
I don't know if I'm going to upgrade this document when other beta version will be out since everything works pretty well almost out of the box with one of the first betas.

Oracle has recently released a new 10g RDBMS version with the first service pack integrated: 10.1.0.3. It gives better support for SuSE and solves some installation issues.
In addition, SuSE has released a new orarun version which makes the installation process a little bit easier.
The plain RDBMS installation is the smoothest I have performed so far.