Love the vision here, always worth a stab at dethroning something this entrenched that everyone seems to dislike so kudos for the swing at it. Feature-wise, pulling in information about the folks i'm interacting with and having customizable views is what I would gravitate towards (especially if you can pull in the person's other social info). In terms of the site, you did this on your about page a bit but what you described here in your description is what people will want to hear (not necessarily the part about Salesforce but your vision of creating something with modern UX with this capability). More thoughts here: https://www.youtube.com/watch?v=Y1ECuZtEuPc