CDN for Rails - any recommendations?

Are there any good recommendations for CDN's (Content Delivery Networks)
for use with Rails? I was looking at Amazon Cloudfront but am just
curious if anyone has used CDNs with rails and whether or not you find a
particular one more useful than the other.

Many thanks.

They should all be pretty much the same, requiring only certain URL
prefixes for your content. You may have to randomize hostnames if you
go with one that allocates blocks of nodes, but that's about it.