As so geek as this may seem, I am sure that we will witness in the next 2-3 years more and more things that tweet. In fact, Twitter has become a convenient communication channel for the Internet of Things: public information can be posted by objects, while other fellow followers may react accordingly. The only problem behind this is the limited amount of data in each tweet, moreover if some metadata has to be added in order to add structure or give meaning to he information.
Other alternatives may be provided by XMPP, the open protocol used by some Instant Messaging systems, which is also a good candidate to create dialogs between connected objects.
In the meantime, enjoy the video of the tweeting house: