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MSNBC is offering a live Webcast of its Super Tuesday coverage online. Could this be the first time a cable channel has simulcast news coverage on the Web? I've asked MSNBC if that's the case, but the network has yet to get back to me. A live broadcast is significantly more expensive than serving up a cached video, as YouTube does. The only other major live Internet broadcast has been pay-only from Major League Baseball, and that's not a replica of a cable channel. Stuck at your computer? Hit the jump to watch some MSNBC, straight from your desk.