I know the main players in the space and I do think I can differentiate myself from them. However, it would be interesting to hear about other players/startups that are in the space, even those that have failed (would be useful to get in touch with the founders so I can learn from their experiences). It could be that I have missed a few things out there and I would love to know about more, in fact, if something already solves the problems I myself have encountered that would be great.
The general category I'm looking at includes fitness/health and technology... so anything from Dailyburn, Fitday, Traineo, BodyTrace, Lose it Lose it, fitness focused forums, iPhone Apps (i.e Runkeeper), Nike Plus, FitBit, Wahoo fitness .. to even the Wii Fit are interesting to me.