RunKeeper is a very cool app for the iPhone. I tried it yesterday and today for my runs and it's working pretty well. I have to try harder to bring back my level of fitness (if the numbers are correct :-). I also need to check in my next run whether the numbers were skewed by the fact that the Freemont bridge was up for a long time so I had to wait. I did pause it but I don't know if it actually took that into consideration.

I need to be doing 8min miles if I ever want to manage a half marathon in 1h45m. This is a good way to monitor progress. I may even buy the professional app just because I think they've done a good job.