Alternatively... walk in to an Apple store with all your stuff
Your article reminds me of how painful it was all looking whilst researching how I should go about consolidating the iTunes purchases from my 2 PCs (1 XP, 1 Vista), iPhone & iPad, along with the music I'd added to both PCs, on to my shiny new Macbook Air, and at the same making it host to both my iPhone & iPad.
Not being particularly techie... yesterday I simply walked in to Covent Garden Apple store with all 5 devices, where a very positive & helpful young man (with a goatie) sorted it all out in about an hour, teaching me as he went.
I left the Apple store happy. Their service is great, and they were nice to me despite my questionable dress sense.
It's in stark contrast to my efforts about 2 1/2 years ago to get Adobe CS3 working on a shiny new Vista-based Sony VAIO. Despite spending 2 days on it, then finally turning up at Adobe's office in Uxbridge and begging (I wore a suit that day), I never did get it to work. I bought another (XP) laptop, and was stuck with the Vista one. I'm going to blow it up soon, I'll send you the video.