Do dreamhost support or allow this: http://ridethebandwagon.com/buy
Why not just use rsync with your Dreamhost server? Which you can do now for free. I wish Dreamhost supported Unison (http://www.cis.upenn.edu/~bcpierce/unison/ ), it would work a lot better for syncing, I use it between my desktop and laptop, works great.
I've used Unison to sync files between my Mac and DH acct. The pre-compiled Linux binary runs fine on DH machines.