Re: They get you coming and going
I'm not sure where you are getting your information, but it's totally incorrect.
There is a core multiplication factor applied based on chip architecture (generally 0.5 per core for intel chips - so one "processor" license is for two cores.
Running on virtual hosts is completely different. If its VMware you need to license all the cores on the chassis, not just those assigned to the application. If it's LPAR, Solaris Containers or Oracle VM you can create "hard partitions" and just license the cores assigned to the partition.
http://www.oracle.com/us/corporate/pricing/partitioning-070609.pdf
I will agree, though, that things can get ugly during audits - like zero discount and 30 days to get into compliance.