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[...] ProgrammableWeb now lists 1001 web service mashups. 46% involve mapping, mostly with Google Maps, which means that when Google goes into Chapter 11 and the sheriffs shut its servers down, almost 500 online applications will suddenly stop working.  OK, it’s unlikely to happen tomorrow, but as I told my software architecture class yesterday, a good architect takes possible failure modes into account when designing a system. If VA had tanked in 2001, and SourceForge had gone offline, it would have set open source back a year; what’s the likely economic impact of GMail disappearing? [...]