Hey Sergey, Larry, and Steve, heads up. These guys all have around the same net worth as Zuck, but much more liquidity. Sergey "don't be evil" Brin's absence f

Hey Sergey, Larry, and Steve, heads up. These guys all have around the same net worth as Zuck, but much more liquidity. Sergey "don't be evil" Brin's absence from the list is a particularly curious... Anyone know what his philanthropic track record is like? Is it mostly through Google.org?