Did mine awhile ago. Some info for the curious:
The 'album club' is a separate item, so if a slipcase and poster don't seem worth the extra money, you aren't required to buy it too. It's set to 'launch' on April 4, so perhaps we'll start getting the album previews and whatnot then..
I purchased both and the total was.. well, it looks like this:
4/1/2008 VISA CHECK CARD PURCHASE QUEEN ONLINE STORE DOM GB $35.76
They already made a pre-charge ;) Actually looks like it might be posted soon, so perhaps they aren't gonna wait til it ships.
Anyway, that's a heck of a lot of money so I hope it's worth it. I'm thinking I'd have been better off just doing the album club for about $4 and buying the regular CD on the date for $10. *sigh*