iOS and Mac apps are coming next, while we perfect Android compatibility. We're also working on contact sharing among accounts. It's our biggest request, and we want to make sure it's right. As for social networks, we already integrate with a number of them. What would you like to see?
As long as you cover LinkedIn, Facebook, and twitter, I'm good. Then again, GitHub could be good too.
Good to hear about contact sharing/syncing. Ideally, I'd contacts added in either my gmail (personal) or my GAE (business) accounts to be available to both [1], and for contacts to be tagged as personal or business depending on where they were added.
[1] Right now, they are available to both on my phone (Android), but not on the web. This is a real pain. For historical reasons, the vast majority of my contacts are in my personal gmail account, but there are great many I use primarily in my GAE business account, and quite a few I use in both, depending on why I am conversing with someone (I keep personal and business emails as separate as I possibly can; just the way I like to do things).
That level of sharing/syncing is my killer feature.
Having said that, I am so used to using Contacts+ for messaging, making phone calls, writing short FB updates, etc., that I would miss those features if I switched to your app.
