The Turning Gate
Found this site when looking into hosting my own web galleries to sell from - basically looking at dumping Expoosuremanager and doing my own printing and shipping to increase the profits on my sports photography site : 10framesasecond.com .
This site has several templates that integrate into Adobe Lightroom's web module to make 'useable' galleries that can be indexed and tied together.
This may be the route to go vs. trying to code something from scratch. I gotta see how well a paypal account can be integrated in.