Wouldn't it make sense to have a generell content aggregation service, that allows to aggregate content for a certain package from multiple instances at one point ?
So, instead of saying, I only have one instance of WimpyPoint mounted at /wp, we mount the content aggregation package for WimpyPoint and it retrieves all the content from the mounted WP packages at /subsite1/wp, /subsite2/wp aso. asf.
As a further step, if we provide good DTD's for the packages, we could even aggregate content across various OpenACS instances (e.g. OpenACS.org could dynamically import the WPs that Lars creates over at collaboraid.biz).
If there is interest I would flesh this out a little bit more, but if you say this is not worth the effort, fine as well ....