I've been trying to download the AMT SDK for a couple of days. I've tried before the weekend and today, from OS X, Windows and Linux and from machines in both Europe and the US; nothing worked. The download typically appears to stall for a minute or two, and then results in an empty file. Occassionally, I get a ~2.5MB file, which is incomplete.
The link I used: Download the latest Intel® AMT Software Development Kit (SDK)