I am a fan of the Android notifications but I have told that the webOS ones are even better! This should be an interesting device all in all.
Ideally, swipe left to dismiss, swipe right to dismiss for now (still listed in the notification "tray").
It does this if you don't swipe it away and you interact with some other app. So, if I'm writing an emial and a text message comes in, it will show up with the full notification, but if I touch the email again, it will show the tiny reminder icon.