Looks interesting. Maybe post about it on the ShopSite Forum to give them information about it.
This post dealt with a POS system that does not appear to be able to integrate with the ShopSite store inventory. Although a POS might be nice having to create a separate store on the POS software and another with the ShopSite software seems counter productive. If the original poster could have the POS vendor contact ShopSite's sales team perhaps info from that POS system could be posted if there is a way to integrate it with ShopSite.