Sadly, it seems to use their interface you've got to be Accredited. (I've logged in and tried)

So I can't actually buy stock in their system.

It's not quite as easy as popping on and plunking in a credit card number. Not that shares are like that in real markets either, but it's actually a little more manageable.

Apart from a link to the service, Shares Post being another one (http://www.sharespost.com/companies/facebook). I've also popped on to SharesPost but it's also 'pending approval'

How does a layman go about buying "what he can afford" in terms of Facebook shares?