Still want to know more?
Here's a demo version of Sufficiently Advanced. This is what we consider the core of the game, crammed miraculously into 20 pages. It's not everything, but it should give you a flavor for what the game's all about. It's bookmarked and commented, and we'll keep it up to date as people tell us more about what they think!
Download the demo here: SA_Demo_v2.pdf (PDF format, about 1 MB)
And here's a character sheet: CharSheet_low.pdf
If you want to see how some people play the game, check out the play reports in the forums!