Bringing this one up again -- I saw Mahanthappa at Edgefest this year, and I've been listening to Codebook (Pi) a lot this year. Vijay Iyer - piano, Francois Moutin - bass, Dan Weiss - drums. From start to finish, a very interesting and compelling record.
I'm also really enjoying Iyer's Blood Sutra. My first record I purchased with Iyer/Mahanthappa was Reimaging (2005), but although I liked that one immediately, I find myself returning to Codebook and Blood Sutra most often.
I also have "Mother Tongue" and Iyer's "Panoptic Modes". I wasn't aware of Black Water, but I'll be looking for that one.
Any other recommendations? Anybody familiar with the duet recording "Raw Materials"?