Sony announced today a white Sony PS3 slim with 160GB. The classic white CECH-2500A LW will go on sale end of July for about $340 in Japan. This is not the first white PS3 slim. Last fall Sony offered the 250GB Sony PS3 Slim Final Fantasy XIII Bundle, which contain a white PS3. Like with "fat" white PS3, Sony is most likely not going to offer the white PS3 outside of Japan any time soon.
Your only chance to crown your living room with a white PS3 is to order it at an Asian video game exporter like Play-Asia.
The shop is not yet listing the new white PS3 slim, but should do soon. Note, that there are certain region locks on Japanese PS3 consoles including on Blu-ray movies. Update: Play-Asia is taking pre-orders for the new white Sony PS3 console now. More Details.
What you can buy though without troubles is a white Dualshock 3 controller here.