Most of the changes to pI since my disk was released have been under the hood. I think the only lessons that would change slightly would be the ones on pIRender, since rendering large size clips is handled automatically now, and a bit on loading emitters might be different. Other than that, the software hasn't had any major changes.
Aharon did release a free update to his DVD from 6.5 to 7 that's downloadable from his website, but nothing since.
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Elvis Deane!
The Apprentice Magician's Guide to particleIllusion
Wilbur of Wumbaberry