I've hardly seen any http://www.eurogamer.net/articles/2013-08-05-crytek-pulls-websites-after-suspicious-activity-detected about this so here goes:

It seems some of the crytek sites may have been compromised and have been taken off-line while they're looking at what happened.

According to https://pay.reddit.com/r/Games/comments/1jo9wg/i_just_got_this_email_from_crytek_they_are_having/ this applies to the following sites:

Crytek.com

Mycryengine.com

Crydev.net

MyCrysis.com

If you have an account on any of these sites it is advised to change your password as soon as they get up again.

Now what irks me is that I do have an account on the mycrysis site, yet I have not received any e-mail from them and their twitter/facebook appear to be more about promotion than providing information. This is not just about an worthless forum account, iirc that account is tied to (or simply is) my crysis 2-account as you needed to log into mycrysis.com to redeem the limited edition content.

So, anyone else received an e-mail or have an account on any of those sites?