Hi Roelof, You have done a good job actually :) but i'd like to comment on a few things: - Concerning the mapping between FL, RL, AL and BL and the Telepathy lists, those are not exactly the same, actually, MSN lists are a bit confusing and depends on other parameters like PL, and GTC, so you should maybe check the semantics of the MSN lists and Telepathy's ones. - From what i have seen, your library API is actually very high level and almost match Telepathy's one. Maybe you should simply try to hide the inconsistence of the MSN protocol and not try to abstract too much if you are planning to build an MSN library. This is what I have done with pymsn, it has basically two main classes each abstracting the NS protocol and the SB protocol :) - Concerning the MSN  specific features,  personally  I think you should forget about them for now,  you can at least implement them in the library, but for the connection manager, we should maybe settle first on a set of interfaces. Thank you for contributing to the Telepathy project ;) -- Ali Sabil