I work at Yahoo, joined a few months ago, run engineering management for a couple of teams working on high-performance cloud stuff very core to the way Yahoo works. I find the engineers sharp and smart, the technology problems fascinating (insane scale/perf requirements) and in general, look forward to getting up and driving to Sunnyvale every morning.
None of that is going to change unless something really dramatic happens.
P.S We're hiring. :) If any of you want to work on a platform serving a ridiculous (and I do mean ridiculous) number of requests and users, hacking on cutting-edge distributed programming work, send me email (address on my profile).