Dear Phil, Please
Update 9/7/11: Per the comments left below by Phil, I seem to have caused offense by addressing the letter to him since he does not personally write these open letters (though he does approve of them, at least generally). But Phil is the originator of the blog and is widely recognized as its leader. Therefore I still feel acknowledging his leadership role and addressing the letter to him (as well as the other team members) was the appropriate choice. However, I do wish to be at peace with my dear brothers in Christ, so I've adjusted my wording.