I've downloaded the FitDay PC and have started using it. It's really quite good. Of course, it takes a while to get used to things, but that's true with any new software.

It has a great overview section that shows on one screen your average percentages over time (you pick the timespan, like the past week or the past month), your daily weight loss, a graph that shows your projected weight loss (based on numbers you enter) from start to goal, number of calories burned based on number of calories eaten based on your custom day of activity, etc.

I've only been using it for a little over an hour, but I would recommend it.