Davey, not agree with u here. In general, I believe when one chooses software, he should consider the quality of the services at least as much as the quality and functionality of the software. Even the best software breaks and has bugs, so what if u have no one to ask in such situation?
Here RH and Oracle Linux differs. The support in one case is supplied by RH, in the other case by Oracle. The prices differs as well.
Also I believe Oracle Linux will start differ from RH in the future.
So to summarize:
Oracle Linux has the disadvantage that it is brand new product for Oracle and to be realistic, no one knows what exactly they are doing about that in the real world, out of the market. RH is well known here on the other hand
The advantages of Oracle Linux are several and they are:
One vendor- so no chance the db vendor to say "This is OS bug" and the OS vendor to say "This is a DB bug"
Oracle will start adopting their linux for their DB - at least the kernel will be preconfigured (if it is not in the current version, it will come soon)
Oracle may stop supporting RH in the future ( although not very probable)