The super-popular "Build Your Own Oracle RAC 10g Cluster on Linux and FireWire" (Jeffrey Hunter) and "Installing Oracle Database 10g on Linux x86" (John Smiley) guides are now both updated for Oracle 10g Release 2 and Linux Kernel 2.6 installs. Go for it!
As always a huge selection of Oracle-on-Linux install guides is available here. Look for a similar collection of guides for Oracle+PHP via Zend Core, Instant Client, etc. approaches soon.