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We previously installed our assemblies in Visual Studio with comments but since that caused problems when you had multiple versions installed we decided to remove that feature, basically Visual Studio sometimes decided to pick another assembly than the one you were using. We are still investigating alternative approaches.
For now you can follow this blog post to get all the comments in a safe way:
http://labs.episerver.com/en/Blogs/Allan/Dates/2009/4/EPiServer-CMS-Intellisense-Comments/
And regards to your other comments, we have no wrappers and the product is built using msbuild and all the normal procedures.