This just in. As we have struggled to find a good way to draw floorplans that were a. emailable, b. easily changeable, c. reproduceable and d. not visually offensive, we used a. Visio (good, but too expensive if you just want floorplans) b. 3D Home Architect (just plain cheesy) c. Smart Draw (We're happy. It's simple, designed for floorplans, and $180).
That said, for anyone else who doesn't want to drop the bucks and just wants to rework an office or kitchen, the tip is all Ikea: IKEA has simple planners for their office line and kitchen lines. They're pre-loaded with IKEA products (natch) but you can use them to visualize layouts quickly. I haven't used the office planner, but I have used the kitchen planner extensively. It's small, fast and clean. (other localized versions available from your country's IKEA site) Thanks, Marc! MGR