In reply to:
They didn't say anything other than the fact that I had been running a blog which they considered to be an SEO link farm (I'm not even sure I know what that is).
If you really don't know what an "SEO linkfarm" is, I'm wondering you you have gotten bitten by the scourge of a "sponsored link" spammish "free" wordpress template.
This has been a real problem of late for many WordPress users, as certain providers of "free" templates have been notorious for embedding *many* hidden links within their templates.
An unsuspecting, or overly trusting, user might like the "look" of the template, and use it on their blog without even realizing they have just shot themselves in the foot.
Were you using WordPress, and what template were you using?
On the subject of your real issue, which is your domain name renewal/transfer, while I understand your concern, I think you may be over-reacting. It's been less than 48 hours, and it *is* a weekend. DreamHost has no interest in holding your domain name "hostage", and the fact they have not yet answered does not mean they wont.
--rlparker