Okay, so while we all know of the several Kendo related manga out there, such as Bamboo Blade, Musashi No Ken and Bushido 16, I haven't seen anything out there for Iaido. Not too long ago, I found a manga about a struggling Iaido club called Haru Polish. The main character loves swords and finds an Iaido club at the high school she attends. Of course, the club needs more members or it would get shut down, and things go on from there. It looks like it's made by the same person that made Bamboo Blade so the similarities are apparent to those that have read it.

I was able to find the series online, but you can buy it on Amazon Japan (in Japanese only, I'm afraid) as well.