Here's JB Hybrid installed on my Nokia 808 PureView:
Gotta love the blues and purples, looking even more stunning on an AMOLED screen, of course. Here's the lockscreen and my main Symbian homescreen... [darn those sub-zero temperatures in the UK in April!]
A selection of the thousand icons supported by JB Hybrid. Very nicely done...
Some of the Jelly Bean elements on display, along with Blade's interpretation of how the Android Holo design language would work under Symbian. Here's a Calendar screen - notice the highlight colour and general appearance, plus the drop-down notifications pane, showing tweaked toggle switches.
No doubt you already have a selection of your own favourite Symbian themes, but if you're looking for something AMOLED-friendly and yet Android-ish then look no further than JB Hybrid.