The secret to today's quick launch Internet 2.0 businesses is Amazon's Elastic Cloud Computing (EC2) service offering. This provides a cloud-based infrastructure that many companies run their databases, websites, and other services from.
Unfortunately, Amazon has had a major outage that has taken down a huge amount of these high profile companies, including FourSquare, Reddit.
To say that running your company entirely off of this type of cloud service is risky would be an understatement. You can read more from the Yahoo! New story here.