Yes, my router provides access restrictions by day, hour, website, and keyword, but I wanted a throttle for my own computer that wouldn't effect the rest of my family. If you're the only one using the connection, then controls at the router or at Comcast's routers makes sense. Also mentioned on the other thread was Freedom (
http://www.ibiblio.org/fred/freedom/ ), a Mac-only application that disables access for a specific period of time or until you reboot. However, throttling sounded better to me, and other iptables modules (e.g. time and owner) can match packets for certain users and certain times of the day. I haven't thought it all out yet, I'm seeing what helps the most to improve my efficiency. (RescueTime, feel free to implement this feature :-)