Poking @Debbie Hagen, @Nora Paxton, @Diane Kitano for a possible follow-up on this since this topic got a little stale. ;-)
I'd certainly like to be able to reference an stylesheet with reference to font-family links to better blend with my company's branding guidelines.
For example, I'd like to send something like this to Support and request it be added to the Head section:
<link href='http://insider.ticketmaster.com/brand-guidelines/css/style.css' rel='stylesheet' type='text/css'>
Then, I'd like to call upon the primary font of InterstateBold, InterstateBlack, etc and other stylesheet related references to properly match our brand guidelines.