Yep. Both my bosses hated me because I didn't push the extended warranties when I worked there. When I was writing up the package I brought it up to them once and said no pressure, if you are interested I can tell you more if not no biggie.
That actually got me great feedback from customers, but my supervisors looking over my sales nagged me constantly. Oh well, 'em.
The best advice I've read on extended warranties is:
1. Most major credit cards extend the warranties to at least double the initial warranty (usually two years).
2. Put $10 a month into an account that is savings/repairs that is off limits from checks/ATM. When something actually breaks, you'll have the money to take care of it, and in the meantime you're making money off the interest (as opposed to the company you paid for the warranty from making the interest off your money).
The other 'insider' trick I have for you guys is that those warranties are the ing gold for the managers at Circuit and Worst Buy. If you tell them you'll buy the service plan from them if they help you out with the tv/laptop/whatever they will usually accomodate you.
Then go back a few days later and return the warranty and you just hooked yourself up with a better deal.