I've worked at a few small startup-y type companies, and in cases where some of the developers had access to production systems, or were deeply entrenched in deployment details, those people also got paged by Pingdom whenever we were down, same as I did.

This made it incredibly convenient, because I'd wake up, grab my laptop, and log in, and then I'd IM the developer and tell him the 'what' of what was going on, and help him/her figure out the 'why'. We'd fix the problem and do another deploy, then go back to bed.