I personaly prefer skype but then again if someone scams you, if you decided you both had a mic and talked you have no proof unless you record it but then its hard to determine wether its fake or not, because it is really easy to record over or add different audio to a video or whatever it may be it would make it to easy for people to be set up ect.
Msn has all its imposters and I think it is a decent way to communicate but chat logues are nor applicable so you have to sit and take a photo op of your msn conversation and there are so many domains that a lot of people get scammed purley by not asking for PMs and people bringing in fake MMs ect, the same B.S
Facebook would never work cause you could just make someones name to match the name in their sythe profile and make fake proof for whatever you please ect.
The only way I think that we could have a better system for the s if we actually just used sythe to talk to each other and make this a better place to trade and to really crack down on scammers is if you provide a chat service through sythe you could use the same set up as facebook we already have the ability to add each other to our buddy lists just no real reason to, if you had a list of friends that you could have on a pop up menu and then simply click on their name and it would bring out the more social side of sythe and make it very easy to get in contact with other users to instigate trades amongst each other, if you also implicated a new ranking for disputes/claims/scam reports like "Live Chat Assistant" or soemthing along the lines, then we could handle all accusations and claims and get them figured out through the live chat and the staff could have access to chat logues of the ALL conversations via sythe chat at their disposal iliminating the entire screen shot, fake proof bull shit and making this an extremley legitimate plaace to trade.
Just my thoughts ^_^ - BUBBA -