Programmers Salaries at google $250k (and up)
Another effect this will have on the start-up scene is that if you build your company in 'The Valley' that companies like Google will be competing with you for talent. You may have an upside from being in the SV eco-system in the first place, however you may find yourself paying a lot more for developers than if you were in a place where parties with pockets as deep as Google are rare.
Headquarters in Silicon Valley, development somewhere else might be a good strategy if you want to keep the burn rate under control.
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Implications of high salaries at Google.