Interestingly, the products receiving the big price bumps are not the core database or application servers, but instead the administrative tools used for monitoring and compliance.
I'd certainly like to say this is price gouging, but really it is just smart business. Oracle knows database sales can't grow forever and that customers will sooner or later need to have additional tooling. Strategically, it's much smarter to price non-core components higher to ensure consistent adoption and cash flow of the primary product line.
This does introduce a few strategy questions related to the impending Sun acquisition--namely, how does Oracle price MySQL and its related packages, and will the existing tools work with MySQL or will customers running both be forced to buy two sets of tools? And will MySQL users be comfortable with Oracle changing pricing policies?
Pricing changes are common across all software companies, but open-source companies like MySQL have generally stuck to simple models to keep the costs of sales low and volumes high.
The big question is if Oracle owning MySQL helps customers. There are no doubt scenarios in which it will be convenient to buy and be supported from one source (the mythical "one throat to choke"), but it's hard to see how the hands-on approach of Oracle sales jives with MySQL's adoption to sales conversion process.
As a side note, if you think the GPL and open-source licensing is confusing, take a gander at Oracle's Application Licensing Table (PDF), which seems straightforward until you need to use a non-vanilla installation.
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