Er, about a month ago, Microsoft released a CTP of Commerce Server 2009 (the product formerly known as Commerce Server Mojave). This is the first feature complete release of the product, unlike the previous Mojave CTPs. Changes include the completed "out-of-the-box" SharePoint site and a package that "seamlessly" upgrades existing CS 2007 deployments. Download Commerce Server 2009 CTP.
Old news I know, but I was surfing Playa Guiones (Costa Rica) at the time (hence the gratuitous holiday photo placement).
If you are using the Commerce Server 2009 CTP, don't forget you can submit feedback on the Microsoft Commerce Server Connect Site.