Oracle RAC 10g x86 on SUSE LINUX Enterprise Server 9 x86
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.