Technically they don't have to provide any sort of SLA to there customers, atleast standard consumers. Businesses may be different. You guys need to remember that the Blackberry by its very nature is a business device and has only really become main stream in the past couple of years.
So what they lost there servers for a few days. I can't remember it ever happening before which aint bad considering how long they have been around. Give them a break jeez!