You should really consider Miller's Photo Labs.
For $40 a month, you can host as many pictures as you want with them, and they will put together a storefront for you with your logo. Here's mine:
Select Event : Storybook Photography
Just give out a URL and an event code at any place you go to, and upload them there. Miller's will sell photos, print them, ship them and everything, plus they do a cool coupon code thing and also you can do timed discounts and email alerts to anyone who has logged in. The prints are awesome.
It wouldn't be homegrown, but if you were serious about making some cash you should really look into this. As long as you can sell more than $500 worth of prints (or cds, or mugs, or giant canvases) a year then you have a business model.