EdgeCast has more than 6,000 accounts and serves some of the world’s leading Web brands for global media delivery and acceleration services".
Nevertheless, EdgeCast also have carriers as customers: Deutsche Telekom [here], TeliaSonera [here] and Telin [here]. I wonder what will happen here. PeerApp, EdgeCast's caching partner may enjoy this as well (see "PeerApp and EdgeCast Offer Operators Joint CDN/Caching Solution" - here).
See "Verizon Plans to Acquire EdgeCast Networks" - here.