Hi all, glad to see we're all still going well, even with some detours!
I have been looking at fitbits, but simply can't afford it at the moment. However, I have found a great free app on iphone called Endomondo - basically, it works on GPS, you set it going with whatever activity you are doing i.e. walking, cycling, running etc. and at the end it gives you your route on a map, a breakdown of your stats, i.e. slowest speed, fastest speed, averages speed, distance covered, calories used. It can also link up to a hrm if you have one.
I have found it pretty much mirrors the calories given for exercise on MFP, but is more useful to show you how far you have gone, speed etc. It also pauses when you stop, like today I cycled 3 miles to a friend's house, then stopped for half an hour, then cycled back, and it only measured when I was actually moving.