It's pretty simple really. One of the houses I looked at was called Pont Noir (it was by a bridge and river). I didn't buy the house but I always thought the name was cool and registered the domain anyway. I thought it was a good choice for the site when I set it up. It's French but still easily understood by those with basic French language skills (it means Black Bridge in English for those that don't). Plus it's short and easily remembered.