Cosplay:

First, check out Tater's How to Make Haibane Wings page (off-site link) for wing-making tips.

You can also check out Evenstar for a Haibane Renmei cosplayer.

There's also a page for a Haibane Renmei group that was at A-Kon 2003.

You can see an image of my not-so-good Mark 0 Haibane Wings here. I learned a lot of things not to do, and I'm working on my Mark 1 set now. After I get those finished, I'll be putting up my own wing-making guide.

A reader, Apest, has sent a link to this blog post (in Italian), where they talk about creating some Haibane cosplay costumes, as well as this Flickr gallery.