Perhaps overexposed is the wrong way to put it. The camera will underexpose the background to being greyish or so, so you will have to bring the exposure up until the background is pure white, so you're only overexposing the background.
That being said they're great but you may want to push the exposure just a bit higher stu, the background still isn't quite pure white so it will have borders if you put it against a white background, the marker image is a good reference of how it should look.
Picking this up tomorrow:
It's not a D50 but it's a SLR, and it's a good one for the price.
EDIT: Went to the thrift stores, got a couple tripods, and a new EOS camera.
It's actually pretty dumbed down and simplified [Only program, no TV or AV] but build quality wise it's a lot better then my Rebel G. The viewfinder is large, bright and extremely sharp, it's made of what feels like an alloy body [with plastic shell] so it packs some good weight to it... Loving it.