First reply from irobot (in less then an hour, not bad):
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We apologize for the inconvenience you have experienced. If your Home Base® POWER light is on, but the DOCKED light (indicated by a lightening bolt) will not come on, please try the following steps:
1. Move the Roomba around on the Home Base® to see if the DOCKED light will illuminate.
2. Ensure that the four screws holding your Roomba's bottom cover are all tightly screwed in and in place. If you are missing a screw, please contact us so that we can send you a new set.
3. Using an eraser, clean off the two silver contacts on the Home Base®, as well as the matching silver contacts on the bottom of the Roomba.
4. Using a dry cloth, wipe of the window on the front of the Home Base®. Also wipe the raised ring on top of the Roomba's front bumper.
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Going top try it, will report back.