A year and a day after last years early egg laying, she is at it again with the first egg! The egg was not there the morning of the 20th. So most likely it occurred last night (Feb 20, 2011), as she stayed in the box as far as I could tell all night. At least she was there with periodic checks from dusk till bed, 10:00ish. So this is the first I have seen of it, after I got the yell from my wife, that there was an egg. It looks like those night visits and naps were because of this.
Anyway, with last years early date, lots of speculation as to why? but it seems this is just her internal clock.