Star Alliance - TACA entry to Star Alliance

Has any date been announced regarding TACA joining *A? It was only noted last year that it would happen in April 2012. I haven't been able to find anything to confirm this.

http://atwonline.com/airline-finance-data/news/copa-avianca-taca-join-star-alliance-april-2012-1121

Discussed here:

http://www.flyertalk.com/forum/star-alliance/1319872-new-latam-members-april-copa-avianca-taca.html