late reply but hopefully you'll see.
AFAIK, stuxnet is not an application where you can simply 'remove' the centrifuge-targeting payload and add your own.
That, combined with the fact that all 4 0-days have been patched, means that I don't think the author's commentary is accurate.
There are much better options for HBGary had they wanted command of a distributed botnet and they would have known that.
"Here are some emails that show this company was planning to use Stuxnet"
Stuxnet is a distributed bot. It can be commanded. The post is saying this company planned to do that.
I don't know whether that's true or not but it seems easy to understand.