There's a load of great stories on the web about previews for Expelled. They went out of their way to exclude vocal internet bloggers from attending previews after attracting a bad review, but despite managing to keep PZ Meyers (from excellent web resource, Pharyangula) from entering the cinema they completely failed to recognise his friend, a one Richard Dawkins. Oops.
For those interested in how obscenely awful this move is, check out
Expelled Exposed