Compete without having to be in the same place at the same time!

GPS systems and web sites are continuing to combine forces and provide more information to aid your records, training or fuel the competitive spirit.
Garmin with their range of GPS models for the cyclist, athlete and tri athlete have really got the market cornered at the moment. Garmin's (PC Based) Training Manager is a useful program but when the Garmin is teamed with Garmin's recently improved Garmin Connect and the independent MapMyRide you can share the information.
Yesterday I learned of yet another web site which allows you to compare your times with friends and other riders who cover the same ground. Essentially you can compete without having to be in the same place at the same time! Take a look at http://www.strava.com/.