Cool SMS services? You tell me.

I am looking to compile the five best/most useful mobile services that are run on SMS. I.e AQA ask a question service.

SMS is the common mobile languague. The volumes of consumers sending SMS is huge, yet people who recieve really useful SMS services, appear to be very low?

If i am under the wrong impression and there are loads of really good/cool SMS services please let me know.

If my view is echoed, let's try to compile a list of what is really good.
Equally if you have a suggestion for something new- SMS based, let me know.

So after a little research here are a number of services i have found:
-At John Lennon Aiport in Liverpool i can text Flight to 60030 to be updated on out bound or in bound flights, just add the flight number.
-The National Farmers Union launched a service to update farmers on the Bluetongue and Foot and Mouth epidemics.
-Snow alerts are common across Europe
- SMS Weather Alerts
-eHound direction service in Australia
-Car Valuation Service- value the car you are thinking on buying when you are with the seller, then knochk his price down!
-Sat Lav- text to find the nearest toilet in London (well it's funny)

Utilising SMS is a good way of engaging more consumers and building the mobile industry.
Please add in your thoughts.