Sorry, the pedant in me has to complain. 'Option' implies a choice. (Indeed, the OS X Dictionary defines it as "a thing that is or may be chosen".) As it is no longer a 'choice', the proper wording would be "- Bluetooth is now standard"
Grimace said the same thing as you half an hour earlier - doesn't the pedant in you have any aversion to redundant comments?
I am puzzled why they did not include the Airport as well. In this day and age it should be standard. It is a $20 config, so why the hell make you buy that seperate. Pretty dumb in my opinion.
I'm not sure how popular Mac pro is as a wireless machine. I can see it more likely being part of a wired network than a wireless one. I bet there are lots of orders that don't use Airport and so the price is kept down (imagine, for instance, a small studio buying 10 Mac Pros in a wired network - saving of $500 just by not including Airport)