(Amazon CloudFiles too, but again, you need to upload files to them).
In addition, if you are just using GeoDNS to load balancing between two US east/west locations, the big wins with GeoDNS are really about users in Australia, Asia or Europe, for closer localities, the only way really is to use an Anycast base CDN, because the odds of an ISPs DNS servers not being close enough for GeoDNS are far too high.
Softlayer's CDN: http://www.softlayer.com/services/content-delivery-network/
(its re-branded Internap CDN, but they give you on-demand pricing)
CacheFly, but you need to upload files to them: http://cachefly.com/pricing.html
(Amazon CloudFiles too, but again, you need to upload files to them).
In addition, if you are just using GeoDNS to load balancing between two US east/west locations, the big wins with GeoDNS are really about users in Australia, Asia or Europe, for closer localities, the only way really is to use an Anycast base CDN, because the odds of an ISPs DNS servers not being close enough for GeoDNS are far too high.