I don’t particularly care about the live streaming aspects though. To me it’s more about comparative results, challenges and motivations of the community. I now have social sports friends met through DailyMile and even here on G+.
I recently started to really use Strava which is a cycling community site that greatly enhances the experience Garmin let lag on Garmin Connect through social features and specific breakdowns of events like climbs which even get classified. Whether the data is being used to motivate (like Kevin’s insane number of continuous running days) or note personal bests, firsts or other achievements it’s all easily possible thanks to the data.
As has also been discussed recently on Google+ getting access to and enabling the meshing of our data for maximum use is still really missing in the market. Runkeeper seems to be leading the charge with their goal of becoming a fitness hub through the Health Graph API, but it’s still quite early.