David Weinberger and I just launched WordPirates, a site devoted to reclaiming some good words from the people and organizations that have twisted them beyond recognition.
One I contributed at the start was “guest” in the context of a hotel stay; when I have guests in my home they don’t pay me for the room.
Anyway, take a look if you have a chance. Contribute your own words, and discuss the ones already there. At the least, we can have some fun.