You can pre-order one now with your dealer to receive one of the first allocations when it is officially released in the Spring next year (apparently March/April, but expect the usual long delays!)
Your local B&O will decide how much of a deposit you pay. I've heard the cost will be about £3,500 for both the master and head unit, but don't know if that's with remote or not - very probably not. I've also heard that you will have to pay to have your CDs ripped onto it at about £1 per disc, but since no-one will get one until next year anyway, this might be wrong/change. It's unlike B&O to give anyone anything for free though!