You can order them w/o ports, or you can disable or monitor the ports. I worked for a private financial firm and our USB drives were disabled.
I'm aware that you can disable the USB ports, etc - I have been a computer security professional for the past 7 years. I was just commenting on the fact that SDHC slots are relatively rare on business-class workstations, while USB ports are ubiquitous. So the suggestion made that Snowden should have used SDHC cards rather than thumb drives in nonsensical.