Maybe Chrome team should have this MemShrink meeting every once in a while. At the current state it will eat every memory available be it 8GB or 16GB system.
Atom won't be closed source, but it won't be open source either. It will be somewhere inbetween, making it easy for us to charge for Atom while still making the source available under a restrictive license so you can see how everything works. We haven't finalized exactly how this will work yet. We will have full details ready for the official launch.