Volume 4 comes out this week so might as well get these out of the way. Here's hoping the coming volumes feature less talking and more awesome!
SP1 - Nanoha+Hayate+Subaru+Tiana talking
SP2 - Creditless ED1
What is the first special? Does it have actual animation or just an audio drama?
Also, what were the specials for the first 2 DVDs?
Oh, you're talking about voice actress interviews aren't you.
SP1 on each volume so far is the voice actors sitting around in chairs talking about stuff (live action). What exactly they're talking about is a mystery to a non-japanese speaker such as myself :P
Vol 1 SP2 was a ~3 minute long clip show of A's with the A's end theme song playing
Vol 2 SP2 was the creditless OP of StrikerS
http://damagedgoodz.net/torrents/mglns-vol1-sp-raw.torrent and
http://damagedgoodz.net/torrents/mglns-vol2-sp-raw.torrent if anyone still wants them. At the moment it looks like each has a seed or two. Vol 2's files were mistakenly named Vol 1 but each set comes in its own directory so it shouldn't be difficult to differentiate.