As I recall in the past, you used to be able to sign up for a dreamhost user id without having to register for a domain? Is it still possible or did they rid of this?
I thought that was a requirement before you could purchase a domain or hosting. But now I see you have to purchase first. Why do you ask? There's not much point to getting a Web ID if you're not a customer.
Yes, it is still possible, though where to do that is not the most obvious without exploring the DreamHost.com site a bit.
You will find the link in the page about the DreamHost Rewards / affiliate program.
--rlparker--DreamHost Tech Support