The business is structured around helping people find apartments. And usually logos involve something with a "map pin" like you would see on google maps.
Check out Trulia.com logo. Our name is play on "Popular Rentals" and we will use some kind of a custom marker/pin overlayed on maps to show where the apartment is located.
Text to be easily readable and blue colors are preferred but that's not a limitation.
Some ideas were around using the "o" in PopRentals as the pin/marker, otherwise it could be to the left of the text. (Move.com has a house inside the "o", so we would like to stay away from that but getting a home or a building into the logo works too.)