Water kefir?

The Sauerkraut and Kim-chi thread got me web surfing about things fermentational and I came across water kefir.

http://en.wikipedia.org/wiki/Tibicos

I can’t decide if this sounds really interesting, or really weird. Anyone here experimented with this stuff?

We have.
My wife likes the stuff, but I like the dairy variety.
We got both cultures from The Kifer Lady;
http://www.kefirlady.com/

Both are EASY to use.

Don’t forget Coconut Kefir.