I recommend Bing.
The thing that you almost forget after using Google forever is that they can always pull up relevant links to what you want, even from ancient forum posts if it's a really esoteric issue that only 5 people have ever had.
DuckDuckGo is decent, but it's no where near Google in that capability. Blekko not even close to DDG. (I have been using Blekko for my default search engine for a week or two now, but I almost always have to revert back to Google, except for really obvious results that I could probably pull up without a search engine entirely. I feel bad saying it, but it really isn't that good. Hopefully they keep working on it, though. )
Bing, on the other hand, was almost neck and neck with Google; it was only very occasionally that I would revert back to Google, and I used Bing for perhaps a month. I theorize that this is because Bing has millions (billions?) of Microsoft dollars behind it, way more than any other competing search engine.
I think I'm going to go back to DDG for a bit. I only used it a few months ago; I'm interested to see if it's gotten better.
In fact, more's the pity. Microsoft is quite capable of producing great and standards-compliant software, and they often deliberately choose not to do this.
Stop thinking about corporations in terms of 'evil' and 'good'. Start thinking about whether their interests are aligned with yours.
Google was 'good' for many years because their growth required an open, standards-compliant internet. That period is ending.
You're definitely right about that. That's why I commented on Microsoft's attempt to play nice. It's also why I'm concerned about the new face of Google. The more we punish/reward companies based on their actions the more their actions will begin to suit us.
"Stop thinking about corporations in terms of 'evil' and 'good'"
No. If enough people start "thinking about corporations in terms of 'evil' and 'good'" then evil will fail. Capitalism is about getting people what they want and rewarding the people who made it happen. We just need to make sure that less technically inclined people also want "good".
Some people have had success with crawl-delay, though there are occasional reports of MSNbot not honoring that either.
I lasted a few weeks, and would occasionally go back to Google when I wasn't satisfied with how a search turned out.
A few times I wanted to switch back to Google, but I couldn't justify it rationally to myself.
Around that time I bought a new laptop and used it to work away from home for a few days. I hadn't bothered to switch my default search engine away from Google. At some point, it dawned on me how happy I was to be back.
When I got home I promptly ended my experiment and have been back on Google ever since.
I will say that I didn't hate Bing or anything. If for some reason I was forced to use Bing instead of Google for now and ever after I'd probably be slightly bummed, but not much more than that.
Maybe an online PDF/PPT viewer would be nice also for links that lead to those files.