Perhaps Valleywag is right and Yahoo insider Jeff Weiner will get the "Audience" job. That will take care of one of the two vacancies. But unless a strong successor to Zod Nazem is immediately forthcoming, one of Yahoo's biggest problems--constant turnover in the tech ranks--will be even farther from being solved.
I suppose it's possible he was pushed (anyone know?), but as John Battelle observes, CTO Farzad Nazem's (ZOD) departure means that only one of Yahoo's (YHOO) three new organizational groups has a leader. Given that the re-org was designed to streamline the company, reduce bureaucratic stagnation, and light a fire under the place, it's hard to imagine how these vacuums help.