Just a plug for the image hosting service I use for my main gallery at DigitalNature. It’s not free, but SmugMug offer an amazing amount of customisation and fine tuning. My old gallery was all hand coded and consequently adding new photos or galleries wasn’t a quick exercise. Using the CSS and HTML customisation of the Pro account (also available with Power User accounts) I was able to make my SmugMug hosted site look almost identical to my original site. With the Pro account you can also use your own domain name and sell your images, setting your own prices. If you’re not confident with CSS/HTML, there’s an online forum with some very helpful and knowledgeable people. Alternatively a choice of themes are available. There’s a free 14 day trial, and if you click the logo above you can save $5 on your subscription.