I have a 3G jailbroken running iOS4.

Does anyone have notification issues?? I have mail notifier and facebook notifications enable and I don't get any .. anyone knows how to fix this issue???

I just tried with PushMail and iPriorityMail and I get the following message "Notifications are disabled! Please enable notifications for iPriorityMail in the Setting app." When i check Notifications in the setting apps I see it configured

push will not work with a hacktivated iphone.
solution is to install pushdoctor in cydia.
However, at this time, we don't have resources to generate unique / legit Certs. You have to wait to install pushdoctor at later time.