I don't really look forward to any time tracking program that uploads my stats to a server. I guess Google will buy it, if you have success, as they want to know everything about everyone. I don't think anyone would want the government or Google to know your habits so well that they can make a profile for you...
Privacy is certainly a concern... But with Google storing every search on a server and every single email on a server... Well, I know someone could do a lot more damage to me with my gmail inbox than a sea of app usage data.
Sorry guys, I didn't mean to preempt your announcement submitting your URL, I just thought it was a service that YCers might appreciate.