I have built roll-away cabinets that go under my bench top, along the lines of http://www.startwoodworking.com/post/roll-away-workshop (but mine not as great looking). It's nice to use them as work surfaces when I'm in the middle of a project, then roll them back under the bench later. Version one has drawers accessible only when the cabinet is pulled out. Version two has mostly drawers accessible from the front, with big item storage in the back.
Good luck.