Great news: Google+ finally supports domain accounts. That means I can use Google+ as "email@example.com" (which is my main Google account) and stop using my temporary "@gmail.com" account.
Bad news: Everyone who had me in his circles has to add me again. My Google+ profile is now at plus.fuxoft.cz.
In a short time, I will also migrate my "Recent interesting links" over there and make it my main "activity stream". Great thing is you can view it even if you don't have Google account yourself.
Word of caution for Android people: Google+ app DOES NOT yet work with the domain accounts! According to Google product manager, "it will work in a few days". Meanwhile, you can use "plus.google.com" address in your browser, it works fairly well as a temporary measure.
Also, Latitude check-ins seem to star working for my domain account, as well as +1 buttons. Great. Now back to work...