I believe the letter JZ mentions is the one which reads:
Dear Mr. Whedon,
I've been a fan of yours for quite a while now. I'm addicted to Buffy, have collected Astonishing X-Men since the first issue was released, and as a Wonder Woman fan, I am greatly looking forward to the movie. Most of all, I'm eagerly awaiting your work on the Season Eight comic book from Dark Horse, and your run on Runaways (here's hoping for Karolina and Nico!).
My purpose in writing this letter, however, has to do with Buffy. As I'm sure you've heard many times before, I was hoping for a bit more of a conclusion to the series (although the ongoing comic will be much better than and end!), and as a devoted Willow and Tara fan, I was dearly hoping to see Tara come back as you'd originally planned. To me and many others, Kennedy should never have existed, and is merely a rebound for Willow. I would like to give you great encouragement to bring Tara back -- and hopefully a later date will see a Buffy movie come out and revive even more of the fandom. Please remember that we (the Willow and Tara fans) outnumber the Willow and Kennedy fans greatly -- just look online, at fanfiction.net, at a site hosting videoes, anywhere.
Willow and Tara are what first drew me to Buffy. The were made for each other, and as sad as I am to say this, if you decide that they are never to be again, I will most likely drift away from the Buffyverse.
I can only hope you won't make that mistake.
[name and location redacted]
P.S.: When my website goes online in around a month, I am planning on giving full support to the comic, mentioning it, and doing everything I can. But if needed, I will have a petition up for Willow and Tara -- and if I disapprove, I can assure you that I will make my feelings known. I hope with all my heart that will not be the case, and I would greatly appreciate a reply.