Humor me: Postgresql vs. MySql (esp. licensing)

Yes, I know you've seen the above subject before, so please be gentle with
the flamethrowers.

I'm preparing to enter a discussion with management at my company
regarding going forward as either a MySql shop or a Postgresql shop.

It's my opinion that we should be using PG, because of the full ACID
support, and the license involved. A consultant my company hired before
bringing me in is pushing hard for MySql, citing speed and community
support, as well as ACID support.

My biggest concern with MySQL is licensing. We need to keep costs low,
and last I remember the parent company was being pretty strict on "fair
use" under the GPL. If I recall, they even said a company would have to
license the commercial version if it were simply used operationally within
the company.

Also, I was under the impression that Postgresql had pretty much caught up
with MySql in the speed category...is this not the case?

Finally, ACID support in mysql always seemed kind of a hack....perhaps
this has changed?

Thanks for any input (armament ;) ) you can provide.

John