There was nothing about Diamond/Pearl in Nintendo’s E3 Press Conference, however Pokémon XD’s US name has been revealed: Pokémon XD: Gale of Darkness. There are also some new images and a game video (4.2 MB) about it.
Nintendo also revealed Nintendo Revolution (official page, official news release), its new generation system and a new GameBoy Advance, called Nintendo GameBoy Micro (official page) and its dimensions are simply microscopic: 10.1 cm wide, 5 cm tall and just 1.72 cm thick!
As for the site, I added a new page about the DS games and pages for Poképark Fishing Rally DS and Pokémon Diamond/Pearl.