Hi there,
OK, we wanted to give you information on when we will be removing Heralds of Chaos from Gaia.
As of now, the plan is to remove it on Tuesday September 17th. The exact time isn't known yet, but it will be sometime during Gaia's normal workday (approximate 9am - 6pm PDT). You will have the weekend to make sure to work hard to get what you need for the Achievement if you don't already have it, and to make sure to convert your Essence into Gaia Gold.
We are still working on making sure everyone gets the Achievements they earned. We also are still hard at work on the Chaos Cash to Gaia Cash conversion. These should be granted sometime after the game has been removed from Gaia, so don't worry if you have not gotten them yet, we haven't forgotten.
If anything changes we will make sure to let you know!
Lastly we want to thank the Heralds of Chaos community for your loyalty and devotion to the game!
Update 9/17/13: As I am typing, Heralds of Chaos is being removed from Gaia.
And we have not forgotten and are still hard at work on getting you all the Achievements and transferring the Cash from HoC to Gaia.
Thanks again for all your support!