I’m sure you’ve been hearing about it off and on since January, but there is an increase of postage rates planned for April 25, 2015. I haven’t heard or seen any updates as to whether it has been approved, but just in case you may want to save some money to stockpile some International Forever stamps – the increase for International postage is 5¢! Postcard rate is increasing 1¢ to 35¢. First class letter (aka Forever stamps) will not increase.
You can read more about it here.