We use Unity for our Blurst.com games. The $5.5 million strikes me as a low amount, but I also heard they were shopping a very small percent of the company to investors. I'm curious if they'll be able to use this money (and Sequoia's connections) to accelerate their growth as a "Flash but 3D" plugin. Technology wise they're definitely strong enough to pull it off, but I don't know if they'll be able to get by the plugin perception issue. The average person doesn't even view Flash as a plugin anymore; hopefully Unity can eventually get there...