I usually try not to write article to promote a specific rebate (since I receive these kinds of email almost daily) but here is one that may interest a lot of you: Adorama is selling LightRoom 3 at 50% off! This is a time limited deal, so think fast!
While it is still twice as expensive as Aperture, if you have been considering joining the Adobe wagon, it could be the perfect time!
I switched to LR more than a year ago and I am quite happy about the move. While I think Aperture has better curve controls, for the rest LR is much better.