Well the first month's data was downloaded June 19th. From previous detection data it is expected that hot jupiters exist somewhere from .25% to 1% of sunlike stars. The transit probablity for hot Jupiters is 10% (because they are close to their suns). The orbital time for hot jupiters is ~1 to 5 days, so the required 3+ transits should be in the first download data. So, 100,000 x 1% x 10% = 100. Even this number will be pretty interesting to see if it is closer to 25 vs 100, getting a more accurate picture of hot jupiter probability.

I'm sure they will take their time getting their data stream and filtering programs organized and checked out. Still it would be nice to some sort of early heads up "pre-announcement" instead of waiting until next year for some kind of formal paper. I'm sure planetary formation theorists will be chomping at the bit to get some of these numbers tied down.

Anticipating the detection of earths for 3 years is going to be a painful waiting process, but worth it. Meanwhile, it will be fascinating as continued detections(of increasing orbital length) illustrate probabilities of various orbital possibilities. By the way the probability that an "earth" would be in the appropriate geometry to have its transit detected is .5%. So the number of earths detected should be 500xPe. Pe=probability of "earths" around sunlike stars. If Pe is 1%<Pe<10% then that would be 5 to 50 earths detected.

The last blurb I read was that actually 150,000 stars were being observed, so that would increase all detections by 50% if that is accurate and maintained above the 100,000 baseline. I would think that Kepler data should be able to double the number discovered extrasolar planets (currently 353--planetquest.jpl.nasa.gov) sometime next year. And the transit method will in one fell swoop have more planet detections than any other method surpassing the current champion of radial velocity.