The company I work for now is also a Tier2 network provider, we don't sell internet services but do manage data plans. All our data is stored at a an old friend's data centre, a few blocks away. I have seen a few cases where companies store data in the US, it's usually a company with a US head office though. Even the ISP we use is not the mainstream Rogers/Telus broadband for home users idea. We have a local, independent ISP that offers managed services for our unified messaging system (reliability and QOS). Everything is stored locally, again just a few blocks down the road.