I'm curious what flaws he sees with the WebOS notification system. It's hands-down the most elegant notifications I've seen on any platform.
Initial notifications are minimally intrusive (similar to Growl on OS X). From there, they can be trivially dismissed or minimized and left for later. This makes triaging incredibly easy and lightweight.
On my Pre, I'll often set alarms on my to-dos and then use them as kind of an on-demand dashboard of my daily tasks. As something gets finished, the notification gets dismissed with a flick of the thumb.
On WebOS, notifications actively make me happy. In comparison, Android is kind of clunky and the iPhone is horribly broken.