I talked to SCT last year about it and they said they would only take certified dealers...no 'off-the-street' enthusiasts who wanted to learn tuning.
After that, a local mechanic bought in and became certified and went to their school....he said he learned a few useful things, but overall wasn't worth the money. Also said they didn't even mention anything about drive-by-wire...which all 05+ mustangs have. And when he contacted them afterwards about it they kept giving him conflicting information that he eventually found out was completely wrong...and that their 'tech' guys are their lowest paid employees with little to no real-world experience.
Once again, this is what HE told me from HIS first-hand experience. After hearing that I never even contacted them (SCT) about the online courses, if those are what you're asking about.
If you do get more info though, please share!