Many of those are so closely tied to the specifics of Google's data centers or the masses of data collected, that the source would be mostly useless anyway. Wha

Many of those are so closely tied to the specifics of Google's data centers or the masses of data collected, that the source would be mostly useless anyway. What differentiates many of these services is not the front-end (it's not like OpenMaps can't do a decent frontend), but the scale. Anyone can write and run a gmail-like service, just look at MailBox.app or Sparrow and the hundreds of webmails that used to exist. Not everyone can do it and serve 500 million users with low latency and high uptime.