Obviously they've messed something up but we all know Apple - it's definitely not their fault, hah. I don't know...maybe they want to force us to update to iOS8. You know, they always brag about how many devices already running the latest version. Tomorrow is the keynote. Guess they wont mention it this time. I've updated to iOS8 when it was released and dropped my jailbreak for it. One week later, I've downgraded back to 7.1.2. Not to be jailbreaked again, no, because iOS 8 is the buggiest iOS ever. Even Audiobus suggested to downgrade back to iOS7. Hilarious! Edit: they've seriously mentioned it. 48%^^
Updates are working again for me (iPad Air). I suddenly got an "upgrade to iOS 8.02" option earlier today. Did that, and while the changelog does not list anything in that regard, my 12 queued updates all went through now. For whatever reasons it asked me to login to iTunes at least 5 times, right after the updates started downloading.