I thought programmers SE should be out of beta long time ago, how come it's still not yet?
We are next in line.
Jin is working on the design, but has decided on to do a redesign based on the feedback from the first & second attempts. Once that's been agreed we'll probably go live.
There's also a question on Meta Stack Overflow about identifying questions to migrate from SO that indicates the go live date is imminent.
http://programmers.stackexchange.com is probably going live this week,
Programmers.SE has been in beta for 99 days: all Stack Exchange sites, barring some exceptional circumstances like a business-development deal (e.g. Ask Ubuntu), stay in beta for at least 90 days. Many sites stay in beta for significantly longer than that.
We're currently next or second in line to leave beta: right now, Jin is working on the final design. Once that's done, we'll leave beta shortly thereafter.