"We are currently accepting air reservations through August 8, 2014. On March 3, 2014, we will open our schedule for sale through October 31, 2014." The extension happened about 6 AM Central Time.
The big news is that we can now book some international cities on Southwest, and you can use a Companion Pass on those flights! This was expected after
Gary Kelly mentioned it in mid-December.
As FT member HPN-HRL notes: "When you click on the "Where We Fly" link on the left side of the main web page, you get a list of all cities flown by both WN and FL. You can de-select FL; the new list of WN-only cities now has AUA, MBJ, and NAS (but no other int'l cities)." SJU is still in that short list.
My speculation: Ability to use the Companion Pass on international flights may lead to the demise or devaluation of the Companion Pass after 2015. If you were planning to earn a Companion Pass in early 2015, you might want to accelerate that plan and do it now instead.