Please keep in mind that Google IS presently the world largest censor.  It's pretty clear that they only avoid doing evil when it is not financially incentivized.  Apple is just being stupid and shortsighted, especially with the iPad.  An open market alongside their closed one would boost them both.  It's clear that Google realizes this as a point of business, and I think given their other actions it's clear that they are doing it for those reasons and not to avoid evil.