Azure Support

The Azure CDN serves data which is cached at different global ‘edge’ locations.
Currently, there are 22 CDN locations:
Related Articles:Windows Azure CDN PricingUsing Azure CDN (Content Delivery Network) In Your App

The Azure CDN is priced in two tiers:

$0.15 per GB for data from European and North American locations.
$0.20 per GB for data from other locations.

In addition there is a flat charge of $0.01 per 10,000 transactions.
The CDN works by caching content at its 20 worldwide ‘edge’ locations, the first time that a file is requested [...]

The Windows Azure CDN is a convenient way for application developers to minimize latency that geographically dispersed application users will experience. As of  as of February 2010, the Azure CDN is currently in CTP and incurring no charges.
Who Needs a CDN?
Application users that are geographically far away from the data center where a file they [...]