This is by far the best social tool I've used, because it lets me customize the messaging for each different social network and schedule the social part to go live when the post itself goes live. (I have very different audiences across my networks, so this is a huge bonus for me.) However, I'm missing so many networks!
If the APIs play nice, I would love to see support for:
Tumblr, including pulling any post image as the image in the Tumblr post, as well as a field for Tumblr tags. I'd want to be able to disable favs/reblogs from the social comments pull.
Google+. for both Pages (relatively new) and Profiles (normal non-business people). However, I'd want to be able to disable "+1s" from the social comment pull.
Pinterest -I'd want to have a choice of which image is pinned
App.Net - maybe this is a crapshoot, since most people assume the network will disappear by the time I finish writing this sentence; but it's incredibly developer-friendly so I bet they'd make it easier than the other ones I mentioned!
I would be very happy to beta-test these if you need help as you roll them out. Thank you!