So, this thing is kinda cool if you're working out at home and don't have ready access to a calorie counter-ma-bob on your workout apparatus (like, as far as I know, exer-balls don't have a meter running as you're slaving away on them).
Check it out.
Also, if you're interested in simply ESTIMATING the number of calories you've burned, then here's your list (not all activities are on this first page. Have a click around to find YOUR preferred sweating method.) Remember, be honest about your exertion level!
That is all for now. I must go research how many calories nonstop coughing burns in an hour. Daggone stupid virusy cold-a-ma-whatsit.