first of all: http://plugins.intellij.net is great!
And I would like to see it getting even better. My plugin project IdeaJad is hosted on SourceForge. So on a regular basis (whenever the OpenApi is changed :) I update some things and put a new release on the Sourceforge site. For me it would be great, if I could just point register a download URL with http://plugins.intellij.net - pointing to Sourceforge. That way, versioning becomes easier and number of downloads can be tracked easier and for each release plus I don't have to upload the same files to multiple locations.
What do you think?