I tried registering here earlier but after waiting a while my confirmation email didn't arrive and after a few tried to resend it I ended up creating a second account with a different email address which worked straight away.
The email address which wasn't working is a @me.com (mobileme) one and is working fine for other incoming mail.
I wasn't sure whether somehow you've made it onto Apple's spam filter but another reason may be that the username I registered with had pipes in it (it was |Rob|).
Is this a known issue at all?
(I wasn't sure of another way of getting in touch without creating a second account. I'd be happy for this account to be deleted if the |Rob| one ends up working.)