Apparently the author who wrote about multitasking hasn't actually tried it out yet, because he's off-base. While the app tray does quickly get cluttered, as he mentions, the lack of true multitasking is exactly why this doesn't matter - you can have as many apps down there as you want but they're not actively consuming resources. Where he's really off is in his implication that it now becomes difficult to find your apps to switch back to them. Look, if I'm playing Peggle and then use 4, or worst case 8, apps after switching out of Peggle - mentally I just won't even think to look in the task tray for it anymore. I just can't keep track of every app I've used in my brain. The tray will quickly let me switch back to my most recently used apps, which is really handy - but when I want to switch back to the middle of my Peggle game a week and 20 other app uses later I... and this will sound crazy... click the Peggle icon wherever it's located on my main screens. The author seems to think that the only way to resume an app is from the task tray, and that's simply not true.
Granted, I had some uncertainty about how this would work, too. But I grabbed a new iPhone and tried it out to see exactly how it works, rather than hopping on the interwebs and writing up an article with uninformed assumptions which then ended up on the front page of /.
Additionally, he goes on to say that developers have to explicitly add multitasking. While that's true for using the background services, my understanding (and correct me if I'm wrong folks, as I have this on good authority but haven't actually tried it) is that for the base level of background freezing, which for a majority of apps is all that's really needed, all you have to do is recompile the app against iOS 4. It's not automagic, but it's really not so bad as the author implies. The worst bit about it is submitting to the app store, but it should be pretty painless to get to that point.
Granted, it's not true multitasking. Everyone knows that by now. But frankly, I'd rather the phone always be responsive and maintain its battery life than have true multitasking for the vast majority of the things that I do and have no desire to have to actively manage my apps (which contrary to the author's claims, I don't have to do). Maybe some day I'll change my mind on that. Maybe right now this level of multitasking isn't good enough for many people out there. And that's cool, we have options now - get one of the many excellent Android phones. But please don't write a blog post of inaccuracies.