A couple suggestions:

The iPhone app has a screen where you can view your week so far as well as your weekly average. A screen like this on the website would be very nice.

Also, I'm a believer that your calories don't reset every night at midnight. If I'm under my goal by 200 today, I should have access to those calories tomorrow. We should have the option to roll over our unused calories.

I don't think the roll over request will be an option because that is not how this program is designed to work. You would just have to do a quick add of calories on each day to move them from one to the other.

Regarding the average for the week, can you use the reports option at the top? I think it shows a bar graph of your average for the last 7, 30 or 90 days.