Thanks to everyone for voting and also thanks for all the creativity regarding potential logo updates!
I take the vote result as a signal that most people do not have a strong opinion (and rather do not worry much about it), but that many people also share the conception that it might be time for an update.
As I had mentioned here, I will follow up on this in the openHAB Foundation and first get all requirements sorted (we e.g. want at the same time a matching foundation logo, also “foundation member” and “openHAB compatible” logos, etc.). As it will be quite some work, we will also set out a price for the logo contest - we might go with a service like designonclick, which e.g. was also used for the Eclipse SmartHome logo and proved to be pretty useful. Once we have a campaign up, I will certainly also inform all openHAB community members here, so that all talented designers can participate in it. 