I’ve been playing around with R and Nike+ and thought I’d put the two together, so I wrote a little R script that pulls your public data from the Nike+ website and plot out the graphs. It’s a little rough around the edges (see below for a list of enhancements/fixes), but it generates plots. I like SlowGeek, but found their smoothing function a bit too “smooth” — it was shaving 1/2 mph from my run speeds. I wasn’t happy with that
Read more to get the source code, below.
Sample: 
For an example of what it might look like, you can see my plots.
» Read more: New R script: Plot Nike+ runs