I want some motivation to increase my pace a bit on my commute, so I'm looking for a website (or iPhone app) where I can upload my GPS tracks of my ride and compare them so I can see (any) improvement over time.
Ideally I'd like a nice report like this site: http://utrack.crempa.net/
but with the ability to compare against previous rides (particularly the speed/distance and distance/time graphs)
I've had a quick google and seen http://www.endomondo.com/ http://www.mapmytracks.com/sports/cycling and http://www.mapmyride.com/ but they seem to be about publishing your ride for others to see, or being all serious and developing training plans and what not.
I just want to a fairly simple view where I can see some nice graphs showing that I'm slightly less of a unfit git than I was 6 weeks ago.
Any suggestions?

