I've had a couple emails from WDW UK offering me a 40% discount, but so far it's only been for Saratoga Springs Resort, and only for very specific dates.
I did read in the Unofficial Guide that they sometimes have offers on that they don't advertise - you have to ask them directly, ie "Do you have reduced room rates for x resort for the dates x-x?" Again though, whether that's only for US WDW travel company I'm not sure.
We're not going till 2010, but when it comes to booking, I'll check the price from WDW UK online, then phone them to see if they could offer any special discounts/offers. No harm in asking!
From some of the US threads they are saying that bookings are down a fair bit, so they might bring more offers out to entice you.
Di x
PS, there was another thread I was reading and someone from the UK was saying they were changing their booking from the US WDW travel company, as the UK one worked out cheaper.