Non Pure-Play CDNs to Choose From

Alcatel-Lucent (acquired Velocix 7/09)
AT&T
Bharti Airtel (partnered with Limelight)
Bell (working with Limelight)
Broadmedia
BT (was supposed to have launched in 2009)
Deutsche Telekom (partnered with EdgeCast)
Global Crossing (reselling Limelight and EdgeCast)
Internap (acquired VitalStream)
Interoute (acquired Virtue Media Services)
KPN
Level 3 (acquired CDN assets of SAVVIS, acquired Servecast)
NaviSite (reselling EdgeCast)
NTT Communications
Pacnet (partnered with Internap)
PCCW
Reliance Globalcom (partnered with Internap)
SingTel
Tata Communications (partnered and invested in BitGravity)
TeliaSonera
Telecom Italia Sparkle (reselling CDNetworks)
Telecom New Zealand (AAPT) (partnered with EdgeCast)
Telstra (launched 6/10)
Telus (reselling EdgeCast)

Pure-Play CDNs

3Crowd
Accelia
Abacast
Advection.net
Akamai
Amazon Web Services
BitGravity
BitTorrent
CacheFly
ChinaCache
CDNetworks
Cotendo
Conviva
Digital Fountain (acquired by Qualcomm 2/09)
EdgeCast
EdgeStream
Grid Networks (merged with GMS 4/09)
Highwinds (acquired Bandcon 7/10)
Itiva
Limelight Networks
Mirror Image
Panther Express (acquired by CDNetworks 2/09)
PEER1
Prime Networks
Real Broadcast Network
Technicolor (acquired SyncCast 4/07)
Velocix (acquired by Alcaltel-Lucent 7/09)
Voxel.net
Vusion (went out of business 5/09)

As reported by Dan Rayburn