As far as I know I am the only one that has talked about the "freezer trick" here. Make sure you put it in a zip lock to protect against moisture.
You are right. This is a short term fix. Should give you enough time to get all the data off, but I have never seen them work for more than a couple of hours after doing this.
The last guy I told about this said it did not work. He was going to send this idea into Myth Busters.
NOTE: This seems to only work on Maxtors.