It's a good sign when a poster who works for or is affiliated with repair/warranty business doesn't automatically suggest getting an ext warr. That's honesty to say the least.
As far as cameras go, I don't know much about them and don't even have my own. All I can say is even if u don't need the ext warr, for others it's the peace of mind they're really buying, which may be worth the $$ if it eases your mind and lets you get on with your life. You need to take into account the reliability of your cam, how expensive it is, repair costs, and shipping if any needed.
Also, read throught the whole ext warr. Find out what's covered and what isn't, for how long/how many times. Make sure they replace batteries for free of cost if it doesn't have a replaceable batt, lens repair if broke etc. Keep in mind, credit cards, IIRC like Amer Express offer additional warr. Also note that in plafces like UK and Europe, manfacturers are required by law to provide 2 year warr on all products.
.
As for my experiences, they've only been for PDAs, desktop PCs, and headphones.
Handspring Visor - this was a gift. Ext warr not applicable as i didn't even know it existed then for this item.
Handspring Visor Neo - ditto here as well. The problems I have with the first one (crashes causing soft resets) were solved by tech supp help followed by a prompt replacement under std warr. Even if they did try to push an ext warr on me. I wouldn't have opted as std warr and their tech supp were nice and sufficient
PalmOne Zire 71 - $80 for an ext warr for a $250 PDA! This was soley for peace of mind, as i use this for productivity/business as well as games/multimedia. I figured nothing could go wrong that i couldn't fix right away, or at worst eventually. In the end, the peace of mind was nice, while the $$ wasn't really worth it. I ended up upgrading at the end of the std 1yr warr while still having another yr of ext warr left. There were stories of how ppl go thorough these like hotcakes. I never had such problems. I guess I'm luckier when it comes to PDAs.
PalmOne Tungsten T3 - I bought this on Ebay since it's no longer in production. It was no longer in production, but few places still had it new. I figured with these types of electronic devices, slightly used, somewhat used, and brand new, if it's going to have problems, they all have a good chance of happenening, so saving the extra $60 would be justified. It was used so no ext warr available. It's still working fine
Tapwave Zodiac 2 - I bought it brand new on ebay, still sealed in box, but since Tapwave shut down, no more warr are being honored. No matter. I use this as my gaming/multimedia device and not for busienss/productivity, so no harm done if i lose its data. I coudl'v bought it from another online vendor who offers ext warr, but again, i've alr had my reasons.
.
Dell XPS550 - Back then, Dell had 3 yr std warr. No need for an ext warr.
Dell Dimension 8300 - Altho Dell managed to screw up my PC initially (1st time a tech came in to replace motherboard to fix defective USB ports, 2nd time replaced whole system since network card wasn't working after 1st repair), once it's up and working, hardware problems are not likely to resurface again... save for hardrive crashes or optical drive failures. Those i could fix on my own. No ext warr was opted. That and ext warr doesn't even cover stuff like spyware/adware removal, software support (just hardware). It's all separated into multiple warranties now. I would be replacing this system after 4 years of use anyways.
.
heaphones - i was paying with credit card, so the extra $3 for a $15 purchase wasn't a big issue. It seemed like a good idea at the time, but otherwise, wasn't a good decision. Just buy a new one for $15. I'm not upset by this decision only b/c it was only $3 wasted
Hi,
I have a rebel xt and it's about 3 weeks old and working great. I wanted to get an extended warrenty and was wondering if any one had any suggestions. Thanks.
PS: i bought my camera from beachcamera.com

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic