Using Facebook, Twitter For Amateur Radio

While surfing the ARRL website, it seems that their "surfin" feature has hit on an interesting concept:

Using social networking sites for Amateur Radio. How can a person use one of these sites for radio related activity beyond simple social networking? This author has no clue, but will be watching to see what develops. The most interesting thing out here in terms of internet and social networking is D-Star, Echolink, and IRLP. WebSDR is also a neat thing. Various applications for cellular phones are available as well. Most of the cell applications are for RX only, unless you are one of those who use their cell to remotely access your HF rig at home.