If you are tasked with deploying Microsoft's Surface Pro in your organization you'll want to grab the just-released firmware and driver pack.
Microsoft has released a downloadable file that you can use to incorporate into your custom images for Enterprise deployment of the Surface Pro. The 55MB file contains all of the firmware and driver files that have been released since launch up to April 2013.
NOTE: This release is NOT compatible with Surface RT and there's not even a hint if one will be available - further questioning Microsoft's commitment to the Surface RT.
Download the file from here: Surface Pro firmware and driver pack - April 2013
Drivers included are from Intel, Marvell, Microsoft and Realtek.