GPS and Heart Rate

Garmin have released a new GPS and heart rate monitor. There's a review on cycling.com. What I like about the Garmin units are that they can calculate speed via GPS, which means you can use it on anything. There are no issues about different wheel sizes and that sort of nonsense. They are also one of the very few monitor manufacturers that provide a real product for Mac users (Polar don't even bother). Something like this makes it pretty easy to get a log out and into GoogleEarth to trace your route, it records altitude etc so it can also generate great data about rides. And since I do some mountain bike riding it is more useful than just a heart rate monitor since if you go somewhere off the map you can, at least, draw a map.

Would love to get one. Particularly since my Polar CS200 seems to have just lost the ability to record my heart. I think the chest strap is buggered - turns out I should have washed it all after every ride which I didn't do, so it is worn out, corroded or otherwise just not picking up and sending a signal. Or I'm dead.