iOS 5 Growl Theme
Someone had to make one.
Made entirely in CSS + HTML! Also as an added bonus, the notification is centered! (Much like the way the iPad does it in iOS 5.) Oh yeah, just be sure to install the right Growl* skin for your display size! (It totally relies on your screen size so it's centered.)
*What's Growl, you ask?
iOS_5.zip
200 KB