Logo for Social Networking / Technology Conference

i'm putting together a tech conference on facebook & social networking, and i need a cool logo that incorporates elements of faces/people, technology, graphs (aka 'the social graph'). the name of the conference is called "Graphing Social Patterns: The Business & Technology of Facebook", and the shorthand name will be "Graphing Social".

Graphing Social or Graphing Social Patterns

Tagline: The Business & Technology of Facebook Desired Color Scheme: should fit against blue & green background -- see website Desired Style: don't know what this means, but style should be modern / tech i guess. Accepted File Formats: jpeg, gif ideally, i'd like the logo to combine elements of 1 or 2 faces, something illustrating a graph (specifically, a directed graph with circles representing people & lines/arrows representing connections), and some tech aspect without being too geeky or too cheesy. that said, i'm open to other interpretations that represent people connecting using social networking, and the related business / tech components. the current wordpress theme i am using is here: http://graphingsocial.com/

Every design category has flexible pricing for all budgets. Logo design starts at $299.