Recently active topics in Fluid tagged with hud

I'd like to create "Go to" widgets that would allow me to type text that would be appended to URLs... this would be very useful for RESTful websites with good URL structures, like Twitter, FriendFeed, etc... Here's a mockup for a HUD:



If I type 'itod', Fluid would take the 'itod' value and append it to a stem, like http://twitter.com or http://friendfeed.com, etc. Of course I should be able to set arbitrary stems like I can with the thumbnail plugin, and arbitrary HUDs depending on the app... It would a little like the old search app Huevos (or Neuvos)!