(source: AKB48's official blog)
SDN48's 1st (and so far only, but that's another story) stage show will finally be released on DVD!
That's the good news.
The bad news is that it's only available as part of a box set (either one that contains EVERY show that was performed or one that also contains K4th, K5th, Himawari 2nd and A2nd), as it's being released as part of a series of concerts called "Minogashita Kimi-tachi he", which was a performance of every single AKB/SKE/SDN stage to date held back in late May-early June.
If you're interested in buying it and you live overseas, your only option is to use a shopping service (such as From Japan) or to have a friend in Japan buy it for you.
The page with more information about the DVDs is available here: