With 26 sports, 39 disciplines and 34 venues, the London Olympics are clearly one supersized event. For those of us who don't keep up year-round with, say, synchronized swimming or dressage, it's hard to know what (or who) to watch -- especially when NBC is airing content on both television and the Web. While not everyone is a standout for the same reasons (some are locks for big wins, others are notable for their underdog status), there are plenty of athletes sure to deliver some drama. Here's a short list of just some of the competitors to keep an eye on.