Though there are plenty of unknowns, Kepler-22b would make a nice place to begin searching for extraterrestrial intelligence. If there's water, and if it's a rocky world, then perhaps some intelligent lifeforms had the chance to evolve.
"This is a superb opportunity for SETI observations," said Jill Tarter, the Director of the Center for SETI Research at the SETI Institute. "For the first time, we can point our telescopes at stars, and know that those stars actually host planetary systems - including at least one that begins to approximate an Earth analog in the habitable zone around its host star (Kepler-22b). That's the type of world that might be home to a civilization capable of building radio transmitters."
Although the highest priority will be for SETI's Allen Telescope Array (ATA) to focus on worlds Kepler discovers inside stars' habitable zones, with enough time and funding, Tarter wants to widen the ATA's scope.
"In SETI, as with all research, preconceived notions such as habitable zones could be barriers to discovery," adds Tarter. "So, with sufficient future funding from our donors, it's our intention to examine all of the planetary systems found by Kepler."