Let me try that link again:
http://auh2orepublican.blogspot.com/2005/08/fair-and-reasonable-alternative-to-dc.html
BTW, it seems counterintuitive, but giving DC to Maryland would probably be a wash in the House. That's because DC isn't populous enough to comprise one House seat on its own, therefore they would have to shift about 200,000 people out of the adjoining MD-08 or MD-04 districts (or both). This would almost certainly not leave enough Democrats in the rest of the state to make up six hard left districts. At the very least you'd quite likely end up with a pure toss up district in addition the two solid GOP seats.