Updated 2012 Jan 15: I emailed Nogami Takeshi asking if he could restock some books on MangaPal, and he actually wrote back and did! How nice.
I decided to make this collection of links to Nogami Takeshi’s bilingual Strike Witches doujinshi, to make importing them less confusing. Here’s a list of all books with a full English translation, and links to their item pages on MangaPal and Amazon.co.jp. Ordered by in-series chronology, they are:
Witches of Africa Comic Collection: MangaPal, Amazon.co.jp. Collects and translates the comics from these earlier books which weren’t all in English: Witch in Africa, Tiger in Desert, Tiger in Desert Vol.2. It also has a new story original to this collection (“The Stuka Witch“).
Witches of the Sphinx Vol. 4: MangaPal
Witches of the Sphinx Vol. 5: MangaPal
Nogami Takeshi has also released his original doujinshi series “The Azure Century Chronicles” the same way. It takes place in an alternate history 1930’s-40’s, as a young man ends up stationed with an all-female naval crew. Also, Winston Churchill is there, being awesome. If you like Strike Witches, you’re likely to enjoy this as well.
The Azure Century Chronicles Summary volume 10: MangaPal
In terms of prices and shipping, I’ve found MangaPal just a little bit cheaper, but that was with a very large order. They don’t offer SAL, which kind of sucks, and ensures that shipping costs will be high no matter what. Still, for fans of the series, I think it’s definitely a worthwhile sacrifice. Nogami’s manga is awesome too; it’s a shame that none of his commercial manga, like “Sailor-fuku to Jūsensha,” have been licensed for the US yet.