It turns out that Microgaming isn't just turning down business from 13 US states (and the District of Columbia). They are geo-blocking them... errr... us, and that includes the corporate site as well.
Here's what a person in the 13 states sees when visiting microgaming.com:
So, after visiting a couple of anonymizing web-surfing portals -- and discovering that I needed to delete a cookie or two from my own machine, since Microgaming is checking for those as well -- I found that by using the anonymizer, I could see the site just fine:
I'm pretty insanely pissed about this at the moment, this being the supposed land of the free and all, and since this is Microgaming's response to the KY domain seizure. What a fucking joke my country has become.