I would be willing to pay for such an app. I spend so much time on the site it would be a no brainer. Plus, when my kids are hogging the computer (WOW, nickjr, etc) I could still get my fix. Great idea.
I pm'd arn about making one a while ago but got no response. I take it from that he either is: Not interested. Already got another developer working on it. Or didn't want to respond