The legendary doujin circle Studio Siesta has announced that they are going to release an Arcade version of their shooterTrouble Witches. There are other 2 doujin games ported right now to arcade (I can't reveld more info). This doujin arcade trend is not strange at all since behind many doujin circles there are programmers and designers who worked in the 2D Arcade business back in the days...

Click here to download a demo of Trouble Witches (125 MB).