Nothing Jumping out at me. [] If we can't pick an icon, we could settle for a nice colour and font for a consistent use of the word <strong style="background-color: #0099ff">Synapse[/b].
The graphic should be infused with simplicity. Agree that right now it is way too busy. Maybe it should have only two tones (black and white or gray) and an "S" superimposed. For example, see the title graphic I designed for my website layout. www.rangelmd.com