Get back to work tool for IT zoomibes

Long-time readers remember the Invisibility Cloak, a Greasemonkey script which blanks out web sites you're trying to avoid in the name of getting actual work done during certain times of the day. Well, Javascripter Jeremy Freese has modified the Invisibility Cloak to blank out sites for a certain amount of time at the top of each hour, so he can avoid checking Gmail or Bloglines more than once an hour.
The result - called the Kiwi Cloak - can be edited to your preferred time. So, for instance, the first 10 minutes of the hour those time-sucking web sites are yours to browse; the rest of the time you'll get a message from the Kiwi Cloak telling you how long you have to wait. Neat riff on the cloak, which has saved me from diving down the rabbit hole more than once. You'll need Firefox with the Greasemonkey to run this one. Thanks, Jeremy &