DD13 is asking for one of these also. So, I have been looking online and reading reviews. There are a couple different ones in the $70-$80 range. Polaroid 300P and Fuji Instamax. Both look similar. You look through a viewfinder to take the pic and the pic comes out instantly. About business card size.
There is also a more expensive one. Polaroid Z2300 - sells for around $180. This is a digital camera 10MP as well as an instant camera. So, you can see the pictures and decide the ones you want to print right away or you can print them from the SD Card. I think the film on this one also has a back that can be used a sticker. I am leaning on getting this one - even though it is more spendy I think it will be worth it more. I think the film was cheaper too. Maybe .50 a print??
Keep hoping it goes on sale - but have not seen it in any of the ads.