Sister Cities Solved?

I have been deliberating with mayors across the galaxy to come up with the most exciting yet least intensive way to have official sister city setups.  Sister cities are to be friendly ways to recognize the good efforts of others.

This is the concept so far:

Have any sort of decoration in your city which proclaims Solaria as your sister city, and I will either name a garden or an item of decor.  In addition-

I'll have a post about it on the Solaria blog, a pic of your city as well as where the decor can be found in both cities.  I can even print a small story about the city and its mayor.  Keep in mind Solaria is aligned rebel, but anyone is allowed in the city hassle free so long as they aren't hassling anyone else.  If your city is called Rebel Gankatorium, Talus (just an example) it may not be the best fit.

Still working out details here, so there may be more to it on my end.  PLEASE submit your own ideas also.  I am open to all suggestions.  Especially if it should be rebel only or a little flexibility to truly unique imperial cities also.  This would be equal recognition...and maybe a way to spread diplomacy across the galaxy.