On my current project I was working to configure the WSS adapter for BizTalk on a separate server than BizTalk. This requires running the BizTalk installer on the SharePoint box and then running the BizTalk Configuration Wizard to setup the WSS adapter web service. I was running the configuration wizard and was just using the defaults and received the following error:
d:depot2300mercuryprivatekwsourcebizofficecodebizofficeconfigurationwssadacfgwssadacfg.cpp(467): FAILED hr = 80070002
This is a similar error to the one reported at https://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=3350889&SiteID=17 but I identified a different workaround that did not require an updated DLL from Microsoft. Rather than use "Default Web Site" as the application where the WSS adapter web service should be installed, I used an already existing web site such as "SharePoint – 80". This enabled me to install the WSS adapter successfully.
While discussing this issue I wanted to mention that the WSS adapter configuration instructions at http://msdn.microsoft.com/en-us/library/aa547280.aspx mentioned that you needed to install "Windows SharePoint Services SP2" but this refers to WSS 2 SP2 and is not required if you currently have WSS 3.