This is one of the only things I could see my mother using on the internet
LifeHacker - Bathroom Diaries
When you're in strange city and nature calls, find yourself a public restroom using The Bathroom Diaries search engine.
Indexing over 12,000 public restrooms in over 100 countries, The Bathroom Diaries listings include toilet ratings, special amenities (like a changing table, wheelchair access and even if there have been celebrity sightings), and comments about security and cleanliness. Handheld users can find bathrooms with it using Vindigo, too.