I'm pretty much certain that he wanted Oracle since he saw Oracle partner logo on competitors website (well, not so much of a competition as they can eat us for breakfast). I'm not sure why the company switched from MySQL to PostgreSQL - I like PostgreSQL more - but for this particular thing, the lightweightesness of MySQL would probably work better. I'll actually throw in MySQL in the benchmark as well :)
Otherwise, it seems there wasn't that much planning of technical stuff - except we need X for yesterday.
I like your idea and wording - though basically I'm planning on skipping that part of asking, and just go for it. Wouldn't come up with asking expert though, can keep that in sleeve in case he doesn't bite the presentation and proof-of-concept.
Have you tried freelancing/outsourcing? Check out Scriptlance
- I work there since 2003. For more info about Scriptlance and freelancing in general check out my home node