Folks:
At long last I've got the self-service interface for Ecosystem data up & running in a fully automated fashion.
The interface requires that you place special Ecosystem-generated tags on your weblog to specify the change that you are requesting: this guarantees that you and only you can make changes to your blog.
To request a change, go to your blog details page, and select the new 'Request a change to this blog' link under the summary section. An automated wizard will guide you through a series of questions about what type of change you are requesting, and ultimately will provide you the exact code that must be placed on your weblog to trigger the update.
These requests are now being processed automatically once a day in the evening prior to each night's Ecosystem update, and no longer require my personal attention. So that means, no more waiting for me to get around to changes, which should be a very good thing for all of us...