[elmarschraml]

Reading between the lines, it seems to confirm a change in business model. To paraphrase: "Turns out software for running Q&A sites isn't that hot a property, but having access to a large part of all the world's programmers is"

[slantyyz]

Serious question - do many people here actually use anything other than Stack Overflow, Server Fault and Power User?

I occasionally get and click on a Google result for the photography stack exchange, but I've rarely clicked on any results for the other Exchange sites for my non-technical searches.

[eterm]

Workplace questions often get linked from stackOverflow, but nearly all of those are in a context of developers. It really seems like much of the rest of the stackExchange isn't that popular outside of developers who have an account through SO.

[pramodliv1]

I use math.stackexchage.com It's an active community with 486,887 questions. http://math.stackexchange.com/questions

[jobu]

We recently bought an older home that needs a bit of work, and I've started going to the DIY site to get answers : http://diy.stackexchange.com/

It's a bit sparse for existing Q&A, but so far people have been good about responding to my questions.

[smackfu]

Depends on the technology. If you use AIX or DB2, you can often only find answers on other sites, because most of the posters are using more popular open-source / free tech like Linux or MySQL.

[omaranto]

The one I use the most is MathOverflow. Second place is probably Mathematics Stack Exchange.

[manojlds]

Skeptics, physics, English and UX have been very interesting and useful for me.

[Floegipoky]

music.stackexchange.com is really handy if you're into that sort of thing

[dagw]

gis.stackexchange.com has helped me out on many an occasion.

[Aldo_MX]

I personally avoid any website related to Stack Overflow unless the rest of relevant search results point to content farms.

After many years of dealing with the hostility of SO, I feel that the effort to dig a bit in blogs, forums or mailing lists is less than the effort you have to do with dealing with SO's redirect loop: Off-topic question, Wrong stack overflow site, Duplicate question, Screw you because I got the reputation, etc.

That redirect loop usually ends up in an old question because some short sighted moderator couldn't tell the difference between the question 5 years in the past, than the question today.