Another page rumour for Deathly Hallows has appeared online. Waterstone bookstores have listed the page number as 608 pages. So that means the US would be around 688 pages.

Treat this as a rumour until I can confirm it with a more reliable source(JKR, Bloomsbury or Scholastic ).

Thanks for the tip Leaky!

UPDATE: Thank you Mugglenet for posting that Bloomsbury says that there is no page count yet for Deathly Hallows.