I've added some more movies to the "Purchase These DVD's" links section. These direct links will allow you to buy these DVDs without any hassle or searching around, which is all too often a pain in the neck. I'm also sticking with YesAsia which is where I've always bought my Ghibli discs, thanks to their swift speed and great prices.
DVD's added to the links include the just-released Kazuo Oga Exhibition (DVD/BR); Oga's directoral debut Tamayamagahara no Yuro (DVD); and Iblard Jikan (DVD/BR), which is Studio Ghibli's collaboration with artist Naohisa Inoue (he provided background art for Whisper of the Heart's fantasy scenes).
Unless specified, these links are for standard DVD's. There are currently only three Ghibli Blu-Ray releases - Kazuo Oga Exhibition, Iblard Jikan, and Michael Ocelot's latest feature, Azur et Asmar (part of Ghibli ga Ippai's growing library of foreign animated films).