Real Gmail push notifications and sync for iOS
I don't know how I missed it, but you can get real push notifications and proper Contacts/Calendar sync with Gmail/Google Apps on your iOS device (iPhone/iPod touch/iPad) -- just use a Microsoft Exchange profile when you setup your account. Instructions here.
After you do that, your Mail icon badge (the number in the little red circle) will update as soon as new mail comes into any of your configured mail accounts -- you don't need a specialized notifier app just for this. Also, your Contacts and Calendar will be perfectly synchonized with your Google accounts.
n.b. Yahoo! mail already has push built-in.
