[UK-AL]

I would have thought build slaves would be a great fit for AWS, since you can boot them up as needed, and turn them off when not needed(Night).

[rb2k_]

We run some Virtualbox builds on them which AWS doesn't support. Our build slaves are pretty busy (I'd say jobs running 16+ hours a day). There isn't really that much possible cost saving towards an OVH server :)

Also: HDD performance on "basic" Amazon is slow and RAM is expensive :(