Any libs you see where tests can be examined / improved would be a great help. I am really looking to have tests be very accurate and worth running. We are finalising the routing lib just now with a new ci-test that will be very good. Then we will tie in utp from crust (with hole punching). So vaults will get a quick run through again to confirm all is well there.
Then we will add in messaging and safecoin (you can see the rfc’s for that) which will get us nicely up and running. There was an issue with utp in crust and routing code itself that is now thought to be resolved.
Just after the break I think there will be a sprint for messaging and safecoin, but with a running network. The network will be all remote on Linodes or similar (Digital Ocean) or able to be run from home (via utp/hole punching) all going well integrating that part (tcp hole punching will follow, for max penetration of home NAT devices).
So getting familiar via tests would be great and then getting into the sprint will be a fantastic way of helping out. The launcher will take on a more rpc type RESTful interface as well so the client apps will become even simpler to use.
I hope this helps a bit.