[chef] Where id node[:ec2][:instance_id] go?

[Vincent Jorgensen < >]

Once upon a time I had a script that did the following:
$!/bin/bash
knife exec -E "search(:node, 'name:$1) { |h| puts h[:ec2][:instance_id] } "

and it worked, that it, it returned the EC2 instance ID of the node in $1.

I hadn't used the script in a while, and when I when to use it today, 
instance_id was gone. Further investigation revealed that it isn't in the 
node at all (knife node edit nodename -a, then search for nstance_d, ec2, or 
i-* all turned up nil).

Did it go away in the latest iteration of chef? If so, why? And is there a 
way I can get it back?

Thanks!
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Vincent Jorgensen