Yeah, this is a common complaint. There'll be a page where anyone (with or without an account) can see all of our pricing details soon (it has in fact already been designed).
As a sidenote, people I've asked who have experience in the freemium space have suggested that displaying your pricing for nonusers serves more than one purpose. There's the obvious one of telling people they can pay for more "features" (in our case space). But there's also the less apparent benefit that often times people (especially more mainstream users) are more likely to believe your service is truly free with no strings attached if they see that there are indeed paid options. Of course this kind of rationale applies more to some kinds of services than others.
If you don't have a dropbox, you either don't know what really good syncing is, or you don't have multiple computers to sync. The latter leaves me with the question why you are trying to look at it anyway.