While it probably won't change the day of any gamers out there, you should still know that GREE, OpenFeint's parent company, plans to shut down the OpenFeint mobile social connection service on December 14. Many of mobile gaming's most popular titles use OpenFeint for achievements and networking.
A shutdown FAQ on GREE's page says that after the cutting off of service, games could be disrupted if not reworked. They recommend retooling to work with the GREE Platform.
What sucks about this sudden announcement is that developers have a very short time to rework their games to have them submitted before the cutoff date. I'm betting a lot of older games will remain untouched, though.
We knew this was coming as iOS has Game Center.