There have been rumors for months now that the Playstation 3's price tag is on the verge of dropping, but you can't be expected to check Amazon every day for that day to come. Instead you can use a new Firefox plug-in that will alert you as soon as the gizmos you've been waiting for are back in stock or at a cheaper price.
BuyLater, a free Firefox extension, adds a "Buy This Later" button to your Amazon searches, so you can click on it and have it looking, every minute of every day, for the lowest possible price for a "new" condition item from any vendor. It'll also keep you updated on when items come back in stock -- remember the Wii fiasco of '06?
While the plug-in is free, the creator has figured out how to get a little dough for each purchase you make. "The links I provide (in emails, twitter messages, and from this website) all contain my Amazon affiliate ID in them, so Amazon (in theory) will pay me a small commission on what you purchase. It doesn't increase what you're paying in any way, so I hope you don't mind."
We think it's genius and the perfect way to get paid for freeware. We salute you BuyLater developer, whoever you are!