I first heard the sad news via Charles Halton's Facebook post.
Jim West expressed his condolences, passed on the remarks of Peter Machinist, and called attention to the words of Christopher Rollston. Jim also notes that for at least a little while longer Eisenbrauns is offering a collection of Cross's essays published in the Harvard Semitic Studies series for only $34.98.
TM Law shared his unique memory of Frank Moore Cross.
On the International Organization for Qumran Studies (IOQS) Facebook page, Sidnie White Crawford spoke these kind words of her Doktorvater: "He was, for me, the real Teacher of Righteousness." She also announced, "There will be a special session at SBL in memory of Frank Cross on Saturday at 5:00 p.m., room to be announced. Colleagues and friends are invited to share memories of this great scholar, mentor and teacher."
Mark Goodacre expressed his gratitude for the work of Frank Moore Cross and shared the NY Times obituary.
Hershel Shanks posted lengthy reflections on the Biblical Archaeology Society's blog. Be sure to check this one out because at the end of the post there are several "additional remembrances and responses." There is also a link to a free e-book that collects five of Hershel Shanks' interviews with Cross.
James Tabor posted his thoughts and linked to--among others already noted here--Jonathan Rosenbaum's post on the ASOR blog and Jim Davilla's at PaleoJudaica. Davilla's post links to several of his own previous posts mentioning Cross.
In a separate post Davilla mentioned that Chuck Jones has collected a bibliography of 42 article written by Frank Moore Cross--all of which are hyperlinked and available on JSTOR in full-text. Thanks for this, Chuck.
I mentioned Frank Moore Cross in an earlier post (see the second to last paragraph) reflecting on Weston Fields' The Dead Sea Scrolls: A Full History.
If I have missed any particularly noteworthy posts, please let me know in the comments.
UPDATE 10/24/12: Lawrence Schiffman posted a link to FM Cross's own "Reminiscences of the Early Days in the Discovery and Study of the Dead Sea Scrolls."