From their Facebook Event page:
As you may already be aware, recently the Atheist Founation of Australia and the Global Atheist Convention websites were the target of a significant DDoS (Distributed Denial of Service) attack, which began on Monday 19 October.
This is a call to all non-believers and advocates for freedom of speech to join us in a global co-ordinated minute of prayer with the aim of inundating God (in this context, the Christian god, God, as distinct from the Greek god, Zeus, the Egyptian god, Ra etc etc) with so many useless prayers that it causes his divineness to go offline as as result of our own DDOS ('Divine' Denial of Service).
The prayer minute will be at exactly 8pm (Eastern Standard Time) and 9am (Greenwich Mean Time) on Sunday 8 November 2009.
The prayer can be about anything you want (but say it as frequently as possible in the minute we have assigned to ensure DDOS is achieved) or to whomever god you want. Its mostly directed at the Christian god so as to ensure we don't get too many return to senders from other gods.
Isn't it heartening to hear atheists urging people to pray to God, even for silly reasons? Who knows, perhaps God will answer their prayers in ways they don't expect. One thing is for sure, they cannon inundate the Living God whose thoughts are not our thoughts and whose ways are higher than our ways. (Isaiah 55)
Some writing on the wall of the event have even suggested getting believers to join in as there's more hope of overwhelming God with prayer - but God is not some internet server that can be threatened by mere mortals, or overwhelmed by thoughts. He is the Alpha and the Omega, he knows the end from the beginning, and knows each of the hairs of their heads as well as their thoughts, so how could a worldwide minute of prayer stop him?
To the atheists, do keep praying!