2015 has been the best year for Postcrossing stamps so far. After 10 years and over 30 million postcards, it seems more postal operators have started to take notice of the postcard revolution happening right under their noses mail sorting machines! :)
The next country to join the club of countries-with-Postcrossing-stamps will be Ukraine, the 9th most active country in Postcrossing. Their stamp will be issued by Ukrposhta on October 9th, World Post Day. Here is how it will look like:

The cheerful stamp was designed by Nataliia Andriichenko, and shows a girl holding a pen, while wearing a traditional Ukranian national costume.
A matching cancellation mark and first day cover were also designed, this time featuring a dove, the symbol of peace. It also symbolizes the postal service itself, as a means of international communication and understanding.

To celebrate the Ukrainian stamp launch, the Lviv branch of Ukrposhta is planning a postcard exhibition and other events starting at 11am on October 9th, at the House of Scientists (Lystopadovyi Chyn St., 6). Special postcards will be printed on the spot, and will available for sale.
Meanwhile, in Kiev, the first day cancellation mark will also be available at the Central Post Office (Khreshchatyk St. 22) throughout the day.