The fastest server I've ever found is cachefly.com
When my internet was good, I was amazed to get download speeds of 1.5Mb/s. But now I get less than half that. Previously, I hadn't thought that possible on my broadband connection.
I'm wondering if those of you on broadband can try one of these tests and let me know what speeds you are getting? I still suspect my current speed is very below average. Mention your ISP too please.
http://cachefly.cachefly.net/10mb.test
http://cachefly.cachefly.net/100mb.test