It would be really great if I could enter my %BF (body fat) as reported by my Tanita scales at the same time as my body weight.
Body fat could (should?) be implemented pretty much exactly the same as "Weight", so should be really easy to add (fingers crossed).
Also, if the user can enter their height somewhere, then the user's BMI (body mass index) could also be calculated very easily every time their weight is entered (personally, I'd prefer %BF, but since not everyone has access to scales that report %BF, BMI would be a good option for many people).
Thanks for a great, *great* little application!! :)