Details of the 1st Volume of DVD and it's bonus feature is up on the official Blog :-
http://blog.valkyria.jp/
Apart from the usual Creditless OP/ED and Making Of Videos (Featuring Seiyuus of Edy and Homer), what is more interesting is that there is a special video of Chiba and Inoue playing the original game aganist Fukuyama and Ohara.
And one final thing, Beach Episode from the game will be animated as a final special feature on the DVD.