Hi All

Charles Lineweaver did an analysis of the statistical trends in the data, and it swings more towards larger numbers of Jovians in decent orbits.

http://au.arxiv.org/abs/astro-ph/0201003

http://au.arxiv.org/abs/astro-ph/0209383

Hence I would suggest we don't yet know enough to delimit the "earths" that might be out there.

Also Discover magazine had a recent article on modelling Earth's weather in elliptical orbits. Eccentricities of 0.3 - 0.4 produced extremes but didn't make the planet uninhabitable.

Therefore habitable moons in systems with Jovians in the ecosphere are entirely feasible. In the Capture theory of planet formation systems of regular moons are caused by tidal distortion of the initial protoplanets - a mechanism that is quite efficient at making large moons around near-in Jovians.

For example Saturn and Uranus possess smallish systems of regular satellites compared to Jupiter - I suspect due to less tidal distortion in their initial formation. Jovians that are further in probably have even bigger moons.

I personally suspect that we will find Mars-sized moons around the near-Jovians, and with tidal forces pumping their geology they will be nicer places to live than our Mars.

Adam