Just ran the very first version of an app we are building on multiple RPIs, it lasted for all of 25 minutes and generated good data before melting down. The fact that all the Pis gave up the ghost at the same exact time, and were all using the same power supply, makes me suspect a power glitch. The RPIs are horribly underpowered (and i mean power in the electrical sense) — for instance it is a known issue that with some power supplies, taking a picture will cause the ethernet connection to drop.
But honestly I’d have been happy if they ran for 5 minutes before exploding. So progress.