I agree with the comments above and I don't understand what is the problem with the conflicts between the two version: people will either install skype from skype.com or from medibuntu but there is no reason for them to try both. Meanwhile, having the possibility to do the later is one of the strength of ubuntu and I believe that asking people to go to the vendor website every now and then to check for update is definitely not the ubuntu way.
I agree with the comments above and I don't understand what is the problem with the conflicts between the two version: people will either install skype from skype.com or from medibuntu but there is no reason for them to try both. Meanwhile, having the possibility to do the later is one of the strength of ubuntu and I believe that asking people to go to the vendor website every now and then to check for update is definitely not the ubuntu way.