I like push notifications, but not necessarily the current implementation. Where you get a popup and you have to hit ok, and if you get several in a row you'll only see the last one.
That's why I use Grip. You can see a video of it here. Of course it is only for JB.
http://www.tipb.com/2009/04/30/quick...one-jailbreak/
I liked most of what I saw in 4.0 os, but did not see anything regarding the managing of push notifications.