let's see if this thing works at all

First off, you need to define "terrestrial". As Nick has pointed out, a moon is required to provide tectonics for the differentiation of land and ocean. Both are probably requirements for "terretrial" type plnaets - those capable of developing advanced intelligent life.

Solely looking at a planets orbit around its star or its spectra does not suffice to establish whether it is "terrestrial " or not. Therfore a "Terrestrial Planet Finder" which relies on anything less than imaging a suspected "terrestrial" planet ab initio is not a "Terrestrial Planeet Finder".

But this is realy a moot point. NASA is specificially enjoined by Congressional legistlation for looking for extra-terrestrial intelligence, and can not fund radio searches, little less optical ones such as some have proposed, without a change in authorizing legislation - talk to the SETI foks if you do not believe me.

in closing today's commet, I'd just like to add,
have a nice day,
ep