Check out R' Yaakov Shapiro's take here:

http://www.jewswithquestions.com/index.php?/topic/468-tcheiles-bzman-hazeh/

1. Title:
   ploni almoni Yoni S, 

   Date: Aug 31 2014

   I looked there, they discuss the statement of the Arizal that techeiles is only in the time of the beis hamikdash.

   For someone who wants to see a serious discussion about this topic, I would suggest looking here http://bit.ly/1s4XPcE, especially on p. 5 and further in the PDF.