Has anyone tried synchronising CiviMail with DreamHost's Announce Lists? There's a post of the CiviCRM wiki about how to sync CiviMail with mailman:
so I imagine it would be do-able.
It would be cool because it would avoid the 200 recipient/hour limit of regular scripted emailing that DS imposes. Reading the DS Anti-Spam policy, I don't think this would contravene it, because CiviMail follows all the DS guidelines (bounce-handling, opt-in/out, etc).