The latest is actually in the biozone, though it is a jovian type
planet, which could easily have earth sized moons. The jovian planets
are the easiest to spot as they are the biggest and empart the most
influence on their suns gravity wize. This does not mean there would be
no earthlike planets, actually it makes them more likely, once you
understand the process of planet formation as a function of stellar
bleeding of angular velocity. If a star has got one planet, it's likely
to have more....
We are detecting a few smaller planets, though still not as small as
earth, more like between Neptune and Earth sized. They have even
detected water in liquid form on the latest discovery, which may be
water on one of its moons....
A few people are working on a process to detect chlorophyll....
Mike