I have a laptop and a tower, and I usually like to use the laptop for my chat and other miscellaneous tasks while the tower is doing the hard work during video editing projects and such. Due to the way my desk is set up, it's kind of a stretch to reach over to the laptop's keyboard all the time, and having a second keyboard/mouse is rather cumbersome, albeit manageable if I keep the second keyboard in my lap. Does anyone make an A/B box that I can plug into the tower and the laptop so I can just flip the keyboard over to the appropriate machine as needed?
There are plenty, google for "USB selector", here is one example
But I think you really should use Synergy instead.