My suggestion for almost all businesses is to use AWS for S3, SQS, SWF etc and then get dedicated/VPS servers in the same data center. I actually get faster ping times to SQS from my dedicated server than from EC2 (both in US-East).
EC2 is the biggest ripoff going around. And all the other AWS services are some of the most awesome going around.
http://codemonkeyism.com/dark-side-virtualized-servers-cloud...
"You can see that if you utilize the servers 100%, then EC2 is between 2x and 3.3x more expensive than renting servers Additionally looking at the CUs the EC2 images are less powerful than rented hardware, so you probably need more of them."
OVH should have their east coast data centre open for customers in August. http://www.datacenterknowledge.com/archives/2012/04/30/europ... I am an alpha testing and their service is great. They are not just a data centre that leases bandwidth from others. They are an internet backbone with ownership in back haul fibre. They are big enough to add 290gbps to their network in days. http://forum.ovh.co.uk/showpost.php?p=42216&postcount=66
Most of the links are 10gbps so it is just a simple hardware upgrade to 40gbps or 100gbps.
Ping times are on average 2.75ms.
Voxel is NYC Incero has Texas and NC locations.
Voxel is larger, great network, great reputation, good prices. Incero is smaller, insanely good prices, new, reliable and great CS so far.