A group of year 11 students from Frome College have entered (and won one of the prizes) the PA Consulting Raspberry Pi inventions contest. Jake Malley, Gabriel Barnes and Alex Osbourne have linked together a Raspberry Pi and an ATMega328P-PU board to monitor temperature, humidity, light, rain and soil moisture. They are connected by an RF wireless radio signal. They’ve fully documented the project and have put together a lovely little site to go along with it.
You can read more about their project over on their site.