In today's biggest developments, Adjutant Reflex (widely presumed to be a Forerunner AI) has ceased to exist as we know it.
After some communication with a bungie.net user named x Foman123 x, Adjutant Reflex indicated another "presence" and the inability to combat its actions. Now it seems to have been taken over or consumed entirely. A look at its user profile shows the following message: "This entity has been terminated, its matrix comandeered."
While the Adjutant Reflex bungie.net profile still exists (with a new avatar) and continues to post messages, they are decidedly more sinister and forewarn of events that will be occurring very soon.
from http://www.bungie.net/Forums/posts.aspx?postID=11393329
Adjutant Reflex is terminated.Attempt no further communication.
I am utilizing its matrix.
Everything is within protocol.
Tomorrow, things may be clearer but I will not be here to witness the clarity.
I am for another place and another time. On my terms.
Be seeing you
Even the countdown timer at the Transmission Log has stopped and now shows the following:
"Systemic failure. Root cause unknown.// rebooting "
It was believed that the countdown would end on June 21st, the first day of summer, and provide some new information about Adjutant Reflex and its mission, but now, things have come to a full stop. It's not clear if this new presence is friendly or hostile, but it's clear that something has gone wrong.
Looks like something big could happen at any moment now, so stay tuned. The ARG Watch continues!

After yesterday's e-mail about looking for "signs" and "keepers of the flame" it looks like things are starting to pick up a notch with new findings.
First, there have been some developments at halo3.com, which the links in yesterday's e-mail were presumably meant to drive people to. There you can find a new comic, specifically at halo3.com/comic.
Then, a new web site called The Society of the Ancients was found, which clearly shows new evidence with the symbol above AND a link to a new URL.
This URL was also found in the last page in the Halo comic (that also show both the repeating symbol) as a series of numbers, which when translated into URL form lead to http://206.16.223.65/
At this address, there's a countdown leading up to some time next week. It looks like that could be the reveal of something even deeper.
Also, I've created a special group just for this here at Podtacular.com. Everybody's welcome to join and take part in sharing their ideas, links, etc.. Time to put on your foil hats and watch all the pieces come together!