It seems that Bethel University, associated with Converge Worldwide -- formerly the Baptist General Conference, recently held a symposium featuring Buddhists promoting meditation.
Here is the reaction from an alum: http://www.crosstalkblog.com/2009/11/bethel-university-seeks-common-grou...
Here is a response from Bethel: http://www.bethel.edu/bethel-news/inter/2009/nov-2009/11-13-09symposium-...
And, here is another article of interest: http://www.earnedmedia.org/ugap1216.htm
Since John Piper's church is part of the BGC, I mean Converge Worldwide, and since he used to teach at Bethel, I'm wondering if anyone is aware of a response he has given to this event.
** Forum Director ***
Edited to fix link

My mention of Piper in the initial post was only in reference to the meditation conference at Bethel University where he used to teach and which is part of the Converge Worldwide (formerly BGC) association. Instead of specifically mentioning Piper's name, I should have inquired if people knew of responses from anyone within the Converge Worldwide association that addressed this event or Christian Zen in particular.
I'm not a moderator, but perhaps a discussion of Piper's preaching/writing regarding justification merits a new thread.