I love it when data, or in this case, tweets, finds itself in physical objects. There's no reason data needs to stay plastered on our computer screens. Embed in the physical world as much as possible, I say. Haroon Baig, a communication designer in Germany, uses a clock that he calls Twitwee to cuckoo every time a tweet comes in matching a given query.
This would get annoying really fast as it is now, but with a more refined filter or event recognition, this could actually be pretty useful.
See Twitwee in action below.