A google hangout this afternoon:
SETI Institute researchers Jill Tarter and Franck Marchis (host & moderator) will hangout with Jason Wright, professor of astronomy at Penn State, Matt Povich, professor of astronomy at Cal Poly Pomona and Freeman Dyson, theoretical physicist and mathematician at the Institute for Advance Study.
These scientists will discuss the potential for the WISE telescope to detect extraterrestrial super-civilizations that acquired a large energy supply by building a mega-structure to harvest the energy of their star(“Dyson Sphere”) or their entire galaxy.”
Jason has done a series of blog posts on the issue, some of which I have linked to before, and some more of which are below:
Big Spheres Around Small Stars – Dyson spheres around the lowest mass M stats are special
There is a good writeup of the general issue “Distant ruins” in Aeon magazine.