My understanding is that, if you put your house on the market before 1 june this year, you do not have to get your HIP in place until June 08. If you put your property on the market after june 07 you have to provide a HIP (at your expense, estimate between �550 and�700) straight away.
I think there will be a rush between now and june this year with people putting their properties on the market, and I think this will speed up the market for this period of time.
I put my property on the market last week, hoping i sell before I have to spend out on a HIP in june 08.
hope that helps any?