Right now the site is still in beta, and as such, new accounts can only be created with invite codes or by buying an account (for as little as $3). I've already given away all of my invite codes, but feel free to check out DW codesharing in to get hooked up with one if you're interested.
However, you don't need to create an account at all! What's fantastic to me about Dreamwidth (aside from just about every damned thing there is to the site) is how seamlessly openid works with it. There's more information about how that works here.
That's it for now!
x-posted to sorrow_by_name