rumour has it that BSG season 2.5 will be released on DVD this September according to TV Guide as reported in TV shows on DVD.com.

http://www.tvshowsondvd.com/newsitem.cfm?NewsID=5355

it's confirmed: Battlestar Galactica 2.5, the DVD set encompassing the second half of the second season of the Emmy-winning SCI FI Channel original series, will be released on Sept. 19 with several special features, including an extended version of the cliffhanger season finale "Pegasus