Obviously, this is a bit of a fantasy, but if Danny does really have something up his sleeve, and this Green physical does keep him eligible to be sign and traded (I really don't think it does, but its fun to think about), here is the trade that I think you need to throw out there:
Boston gets:
Paul, Okafor, and either Fernandez or Brewer (whichever NOH doesn't want)
NOH gets:
Rondo, Green, Bradley, Fernandez/Brewer, picks
Dallas gets:
JO
Now, the downside is, this eliminates the opportunity for a Paul/Howard superteam. However, that might actually be what is necessary to get this past the owners, plus, it sounds like Howard will be going to NJ or LA anyways, so he won't be signing in Boston next summer anyways.
But, this gets the C's Paul, along with a true center, and a young wing to take Green's spot.
It gets Dallas the cap space they want next summer, as well as some extra depth at the center position in JO.
And for NOH, it gets them a couple younger guys to build around in Rondo and Green, a couple young unproven guys to sell to your fans, and a couple draft picks.