To highlight Greg G.'s announcement about the forced logout for all users today because of the Heartbleed SSL bug, I just sent out a tweet (drafted and reviewed on IRC with Greg and James F): https://twitter.com/Wikimedia/status/453646877397757953 (from @wikimedia, retweeted by @wikipedia and @mediawiki)
Not planning to post on FB and G+ right now, but open for suggestions/opinions.