I already posted about him in the daily threads, but I think after his last start he needs to be approaching universal ownership. Still only at 16% owned in Yahoo, he is pretty much entrenched as a member of the Yankees starting rotation with Phil Hughes's well documented struggles and demotion, not to mention the well documented struggles of Burnett, and inexperience of Ivan Nova. Freddy Garcia is a reclamation project in his own right and CC is the only well established starter in the rotation.
Since taking a spot in the Yanks rotation Bartolo has had the following two starts (2-0)
6.2 IP, 5H, 2BB, 2 ERs, 7Ks
8 IP, 7H, BB, ER, 6Ks
These came after strong appearances in long relief. I think a very strong argument can be made that he's the #2 in the Yankees rotation right now. I'm not sure he's a "must own" in the shallowest of leagues, but he's definitely getting there. However it is that he's getting it done, he's worth the ride for the time being.