Hi, just stumbled over this group.
We've been working hard on something very similar in last months. Have a look at the fluxservices module (http://drupal.org/project/fluxservice) and the fluxkraft distribution (http://www.fluxkraft.com).
Especially the fluxservice module could function as a base for most of your usecases. It stores web service endpoints and service account authentications in a centralized way and provides an API for further integrations, that hopefully follow.
Currently we have basic integration modules for twitter, facebook, linkedin, dropbox, flickr and xing.
Also the deep integration with Rules and the Entity API helps to build some very interesting usecases. For example it is already possible to list tweets as remote entities or to schedule facebook posts.
But there is much work to do. We need definitely help with further integrations, testing, bug fixing, documentation and so on...

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hi criz Looks awesome, are
hi criz
Looks awesome, are you going to drupalcon Prague buy any chance? we got a bof setup https://prague2013.drupal.org/bof/drupal-social-initiative would be great to meet you if you are around.
Yes, I am in Prague and added
Yes, I am in Prague and added your BoF to my schedule already. Will try to bring also fago and fubhy, so they can tell you more about some technical details.
We have also a session about using the fluxservice API with Rules: https://prague2013.drupal.org/session/automating-and-linking-together-we...
Cool!
I know what you did last summer :)
Looking very good and already feature complete! tnx.
thx!
In fact it was not only the summer... ;)
criz that's great wish your
criz that's great wish your session was first would have saved us grilling you about flux.
Seen HybridAuth?...
Has anyone seen http://hybridauth.sourceforge.net ? It seems to be an abstract API for all PHP applications and not just Drupal. Would this be a better route to go down?
We really need to map out these layers and services and APIs and code like HybridAuth and Fluxkraft and Guzzle and see what makes sense to pursue. Right?