Are you on an iDiet?
If you really want to move your dieting practice into the modern age, you may want to check out The Connected Scale from Withings, a WiFi-enabled scale that sports a free companion iPhone app (iTunes link) that will give you access to information about your weight and body-fat percentages over the course of time, all viewable in table and graph form – and accessible from the Internet.
Now, there’s a password you’ll want to keep secure.
UPDATE: Withings informs CoM the Connected Scale will be available to US Customers in September at a retail price $159 USD, on their website (http://www.withings.com/). And yes, it can display weight in pounds.