Mm, I don't recall exactly, maybe 7 or 8? vndb says anywhere from 2-10, though.
Yeah the VN is much better, I was excited for the adaption but then very let down. They left out a lot of parts I feel they shouldn't have. LB! is great though, I love most KEY works.
Ah, I loved Kannagi. It was a very pleasant and relaxing watch. The OVA was hilarious too, I laughed a lot at that.
So you like Touhou too? What's your favorite character? I've been playing a doujin game lately called Scarlet Curiosity. It's pretty cool, you play as Remilia or Sakuya and the graphics are the best I've seen for a doujin game!