Man, I really thought that the OP was using a bit of hyperbole on the Divio proposal, but holy shit - that is the single best presented and thought out proposal I have ever seen. I'm sure they went a bit above and beyond due to the high profile of the site involved, but I'm seriously impressed. What a fantastic reference point for what a design and website proposal should be.
What a smart marketing tactic (that paid off in a sales win too) to just throw everything into the proposal and kill it. Very smart, and it speaks volumes about the organisation.