How can I automatically upload a release into Codeplex?

I'm imagining something like msbuild /t:CodeplexRelease which would build, then upload the outputs to the specified Codeplex project.

Has anyone done this?

Here's documentation on using the "CodePlex MSBuild Tasks" for creating and uploading files for a new release: http://codeplex.codeplex.com/wikipage?title=CodePlexMSBuildTasks&referringTitle=CodePlexAPI