Seeing that Oracle 11g is out, and exclusively for Linux at this time, I decided to download it among the first and see and share with you what it's installation looks like.
Read it at Linuxinsight.com
I won't go into details with preparation tasks (stuff you need to do even before you launch the installer), because that is very well documented (Oracle database has great, although a bit overwhelming, documentation). When you unpack the zip archive, you can access the documentation with your browser (iceweasel welcome.html). Suffice to say that you at least have to create an oracle user and group, and recheck you shared memory parameters.