Have I been under a rock (always possible, this time of year), or is this breaking news? I just learned that international first class stamps - currently $1.05 - will go up to $1.10 on January 27, 2013. Oh dear. It seems so recent that they just changed to $1.05, but I guess that was way back in January (2012).
To soften the blow, the new international first class stamps will be "forever" stamps, meaning they'll be valid for full postage with any rate change, just like the domestic "forever" first-class stamps. I guess that's pretty cool. The stamp design is round, which looks nifty to me:
You can learn more about the stamp on the Beyond the Perf stamp preview, which is also a lovely way to get a look at the new stamps to be released next year.
UPDATE: Thanks to Derrick for alerting me that regular first-class domestic stamps go up to 46 cents next month as well.