The game has essentially gone viral at this point. Multiple webcomics are covering it. There's decent coverage on social news sites. Industry rags have picked it up. Industry veterans (I have a friend at Disney Interactive, and another at BioWare) have absolutely taken notice, Valve in particular. Some review sites are seriously considering it as their "game of the year" candidate. This weekend the website (and authentication service) collapsed under load. With some outside help it's up and fine after some refactoring and offloading things to S3. Today he cracked 25,000 unit sales for the day, or about $340K USD in gross revenue.
Yes, he. Until very recently, it was basically a one-man show. There's a few dedicated folks coming on board now, but that's what's humbling. Today, Markus eclipsed my day's compensation in just 88 seconds.