^ Gavin is actually proposing increasing the limit to ~16.8 MB, and then having it increase by 1.4X every year, for 20 years.
He picked this number after running experiments to see how a full node would function with 20 MB blocks, and seeing that it could easily handle it.
I think increasing the limit to 20MB is ok .... but will refuse to support a hardfork that includes an algo that automatically increases the limit every 1.4 years... It is one thing to test up to 200MB and another thing to assume that is the future we want when we could easily have other solutions along the way.