I just noticed on the DT site that they have a wordpress plug-in for direct loading into blogs.

Is this new ( it may have been there for a long time I just didn't notice it)

Do you think this is a good idea?

It's not clear from their plugin page

http://wordpress.org/plugins/dreamstime-stock-photos/

but I think this is just a shortcut to purchase. I'd say that's great if they'd have a quick way to pay via PayPal for a single image, which as far as I know they don't. You don't have anything quick and easy if you don't already have a DT account.

And I think if I were buying I'd want to keep my purchases somewhere other than the WordPress media library so I could more easily re-use them later.

It's had some downloads but the two "reviews" look like DT staff talking it up

Yep, those reviews are from DT admins. I agree, non-credit sales without having an account and credits has been asked for before.