An open source app store from a Linux vendor is a good idea, right? As it turns out, Linux vendors selling their open source partners solutions directly isn't always a recipe for success. Just ask Red Hat, or its rival Novell. In 2007, Red Hat launched an effort called the Red Hat Exchange (RHX), a marketplace for selling open source solutions from Red Hat's partners. RHX was in part Red Hat's response to competitive pressure from the Novell Market Start program. Now in 2010, neither of those sales programs is still operational.