If you missed Barack Obama’s keynote speech last night, and want to see it online, don’t bother pointing your Mac to MSNBC’s offering — the network requires you to be running Windows in order to see any video. Interestingly, the DNC’s video archives offer a few options, including both Quicktime and Windows Media, and both play just fine on a Mac. Gotta love deceptive platform lock-in… (Oh, and if you did miss Obama’s speech, you really should hear it.)