As the 2000s began, Black surprised some of his jazz fans with the establishment of his rock-inclined AlasNoAxis quartet, also featuring longtime collaborator Speed on tenor sax and clarinet, Skuli Sverrisson on bass, and Hilmar Jensson on guitar. Black proved as innovative as ever as a bandleader, this time exploring post-rock/experimental directions while continuing to draw from his background in avant jazz. Seemingly balancing influences from Seattle and Icelandic rock with Brooklyn jazz, the AlasNoAxis quartet blended harsh textures and a disarming melodicism, while always emphasizing Black's assertive and often skewed rhythmic foundation. Over the next decade, AlasNoAxis would release five innovative albums, all on the Winter & Winter label.

Meanwhile, Black remained a key member of a number of other working groups, most prominently Chris Speed's yeah NO, the Ellery Eskelin Trio, Hilmar Jensson's Tyft, and the Satoko Fujii Four, not to mention a reunited Human Feel, who released a new album in 2007 on Speed's Skirl Records label. One of Black's higher-profile gigs was as drummer for Laurie Anderson's touring band (which also included bassist Sverrisson). In the coming decade, Black would remain active, releasing a live collaboration between himself, Tim Berne, and guitarist Nels Cline (under the name BB&C) in 2011 called The Veil. Two years later he delivered AlasNoAxis' sixth album, Antiheroes, and played on Uri Caine's adaptation of Gershwin's Rhapsody in Blue. In 2015, he joined pianist Kris Davis' Infrasound octet to record the album Save Your Breath. ~ Joslyn Layne & Dave Lynch, Rovi