We're doing something along a similar vein for LazyReadr. The idea is to merge news about the same story together, an important step from there will be deciding which is the authoritative source to display. Going from that to effective search isn't a large leap.
I use duckduckgo as the default search engine with Chrome, and it works really nice. The key to make switching easy: Preface your query with, like `!g my-query' or `"!bing my-query' to search on Google or Bing. Useful, because for me Google is still better on searching stuff in German.
Just using `! my-query' gives you I'm-feeling-lucky semantics.
Have a look at http://duckduckgo.com/bang.html for an exhaustive list. !hn searches Hacker News via searchyc.com.
EDIT: I see that the extension actually redirects to SO. So in a way the presence of those sites when I wouldn't normally see SO results is a good thing. Nice.
I completely understand why you're doing that, but you should know that's seen by the Goog as a big +1 for efreedom. All they know is you clicked on that result and didn't come back because it didn't answer your question.
At the very least if I am logged into my gmail account, I should be able to hide certain site from being returned in my personal results.
That would be the fastest way in my book. I've never worked out why SO allows it in the first place. Is it just to appear open and web 2.0-y, or is there a business reason. It's a proper business now, users are loyal, cancel the licence. I can't think of a single person who would say 'oh, but I much preferred to read those spam sites'.
As someone who has contributed a fair amount of content to SO, I would wholeheartedly support modifying the CC license on the content I've contributed. I much prefer the idea of that to the idea of allowing my answers to help build dens 'o spam like eFreedom.
Now that I think of it, my answers going straight-to-spam is a nontrivial detriment to my contributing content to SO.
But I really posted this comment in reply to say thanks for the blog posts on jquery/asp.net. They really got me going in the right direction - fantastic stuff.
1) Is it possible to require the question title as anchor text in the creative commons link that points to the question (and not a nofollow link obviously)?
2) Make a widget for embedding a question and chosen answer on a web page, along with a link back to the question, a la google maps.
3) Make a wordpress plugin that takes a stack overflow link and turns it into the question and chosen answer, with a link back to stack overflow.
The specific example at http://webmasters.stackexchange.com/questions/5385/page-appe... is ranking SO at #1 for me now, but if you send some more examples I'm happy to chat with people in the search quality team about this.
I looked around eFreedom's site a bit and they are providing some additional add-on value (translations etc.) so that may also be the case. In any case, best of luck in getting SO pages ranked better.