Hi, I'm Colin, I work for Griffith University in Australia. So far with Tikiwiki I've hacked the code to work properly on our Oracle backend (including changing the oci8.sql script, bleh). I'd like to port the code back into the 1.8.x dev stream but so far my forays into discussnig this with IRC people and other developers have resulted in nothing.
So. Please contact me if you can help me get the oracle changes officially ensconced in the tiki code.