It would be cool, and somewhat of a convience, if you added a 'Shop' feature to your feature list at SMF. You could always do a MOD, but when I was a small time web master, I choose to stear away from MODs simply because of the risk of messing up. And also my lack of skill in doing that stuff. And since this is called Simple Machines -- shouldn't this feature all ready be added in there?
Just a thought.
SMF is a forum. A shop is not a proper part of a forum, adding it would be feature bloat, which we want to avoid.
So sorry, but i doubt that a shop will ever be a feature.
There is a Shop mod already. SMFShop - Shop MOD (http://www.simplemachines.org/community/index.php?topic=52563.0) With SMF installing mods is as easy as 123. Just go to Admin Panel > Packages > Download > and install. No need to edit files manually. ;)