On Thursday 20 July 2006 17:11, Andrew Zbikowski wrote: > I don't know of any either, but I always thought someone should invent > a chair with a pressure switch that could communicate with your > computer. Then script/integrate/whatever with IRC/IM clients to set > yourself away and back automatically. > > I don't see anyone buying it ever, but it would be a fun little side > project...if I had time for another side project. ;) I'd suggest checking motion rather than mass. It's pretty easy to hook an IR motion detector to the printer port. Radio Shack had a cheap one a few years back, and it only involved soldering one wire. Add a few lines of C code, and it would call a function when something moved. It was really quick to put together and was unobtrusive. Jeremy