The live webcast of Apple CEO Steve Jobs’ Macworld Expo keynote has set a new record for the delivery of content at broadband rates.

The webcast at attracted more than 400,000 hits and delivered the equivalent of 67,000 hours of content.

More than six terabytes of content were served during the one-and-a-half hour webcast, which attracted more than 95,000 unique Web visitors. During the peak of the webcast, more than 4.3 gigabits per second of video were streamed at broadband rates to more than 21,000 simultaneous viewers, including 5,000 visitors who watched one megabit-per-second (MBps) streams.

The keynote was streamed over Apple’s QuickTime TV network, which delivers broadcast quality and includes Apple’s QuickTime 4 player. It was delivered by Akamai’s FreeFlowSM Streaming service and global network.