Not sure of Yar-PocketBookers source, so I could be quoting the same one, but ABT Electronics is stating an ETA of Jan. 2012.
http://www.abt.com/product/56349/Sony-PRST1HBC.html
Sony Black Wi-Fi Pottermore Edition eBook Reader - PRST1HBC/ Wi-Fi Access To Over 2 Million Titles/ 6" (600x800) Clear Enhanced Touch Screen/ 2GB Internal Memory (Optional MicroSD Media To Expand Your Storage To 32GB)/ E-Ink Pearl V220 Glare-Free Screen/ 16 Level Gray Scale/ 12 Built-In Dictionaries/ Note-Taking/ Stores Up To 1200 Titles/ Bookmark Pages/ Audio Playback/ Includes Voucher Coupon Code For A Free Download Of Book 1 Of The Harry Potter Series/ Black Finish/
ETA January 2012
Note: As of 9/27/2011, Abt has since removed the linked page and the new pages for the PRS-T1 no longer provide an ETA.