The ringtone. I know it's a little thing, but it really made me sit back in awe of just how much thought was put into the technical aspects of the world of Caprica.
It's such a minute detail, but I love it so much. A non-invasive little electronic knocking sensation on your mobile.
For your convenience and enjoyment, I've taken a sample and created it into a rather crude iPhone ringtone. Hopefully there will be better sound samples to pick from in later episodes.
As an aside, does anyone else find the Caprica poster image of Zoe a little perverted? Or is that just me? I know Alessandra Torresani is 22, but she's playing a character that's about 16/17 at best.