AskUbuntu was launched by Stack Exchange and Canonical and is now linked to prominently from the top bar of Ubuntu.com
Ask Ubuntu is also linked to from the installation GUI. This is beneficial for the site as it generates a lot of traffic.
I think we should also aim for more visibility within the Arduino platform.
We should be here:
Also, if you open the Arduino IDE, it links back to Arduino.cc from the Help menu. We should be there as well, alongside Arduino.cc
Both of these however, are more long term goals, and will most likely require the support of Stack Exchange, due to Arduino trademark issues.