So what prompted you to build this XF?
I'm an avid mountain biker. The biggest problem is finding people to mountain bike with. As much as I enjoy mountain biking by myself, I have 10x more fun when I'm with someone. Most of my friends are either not into the sport or have schedules that don't allow them to go on a ride as frequently as I would like.
I volunteered to help my local mountain biking association rebuild their site but they opted to go their own way. So with that I decided to invest the time I would've spent on their site on my own site.
I figured if there was a place where you could post that you were going to go out for a ride and people could come and do a search for all rides within X miles of their home, then people would be able to easily connect. Once I started building it I realized how easy it would be to incorporate a wider range of sports. So nearly 10 months after the fact, and a lot of on-again/off-again development, the site is 95% done. The core is there, now it's just a matter of getting people to use it. Without data, it's sort of worthless.
Looking at a user's profile that has a lot of data,
such as this one, gives you an idea of what it would end up being. You can also see
that particular user's sports stats, or stats for
the entire sport in general.
But all this isn't possible without a good user base, which is the next step.