I've just booked our very first trip to DLP for 12 to 16 Dec :D :D :D - can't wait!!
Quidco seem to be doing a DLP promotion at the moment, it's currently 5.5% cashback. I used the link on Quidco's site, which goes through to disneylandparis.co.uk, booked our holiday, and it tracked onto my Quidco account by the following morning. It can take a few months for the cashback to come through, but I've never had a problem.
So anyway if anyone is thinking of booking online in the near future, and you don't already use Quidco, then I recommend you do!
Hope I'm not being too cheeky my posting a link with my referral code ;) :
//http://www.quidco.com/user/1864666/disneyland-paris/email