Browsing that site, The SETI Institute appears to have expanded beyond its original goal of finding extraterrestrial intelligence into astrobiology and more. Perhaps the first attempts at detecting alien radio signals hoped too much?

I have little doubt that, given the infinite size of the universe, that extraterrestrial intelligence (of some sort) exists, the question is whether we will ever detect it... It perhaps even exists as close to us as Europa, should we attempt a landing there...