I wrote this up because I was trying to decide which client to use, between Proteus, Adium and Fire. Then I figured I couldn't be the only user to have this dilemma. So here is my list. (I use MSN, Yahoo and ICQ) Proteus Pros:- Didn't lose my entire MSN contact list grrrrrrrrr Nicer interface Nicer alerts No annoying quack Tells you which service your users are using All messages tabbed on one window with cool little drawer feature Yahoo works Doesn't do weird things with the groups. Can see when the other person is typing Cons:- MSN - half my contacts missing although they appear if they come online, but it does mean i can't edit my preferences for them until they do Doesn't sync automatically with address book im field Annoying registration nag thing when it's not quite non-buggy enough to justify registering When I delete someone from my contact list they stay there Icon quite ugly Blocking someone doesn't really work No scope for file transfers Adium Pros:- OK so the duck is quite sweet and looks cute on the dock... Syncs with address book automatically Is free Ok interface/alerts All messages tabbed on one window - convenient esp. for exposé Cons:- Still an Alpha version so have to keep downloading a new version everyday, makes it buggy and unpredictable and I lost my contact list after the last download. Can't figure out Yahoo at the moment. Quacks. Fire Pros:- Can have metal! Everything seems to work really well - ie. non buggy Shows which account everyone's in. Heavily customisable All accounts seem to work fine Icon can show things like no. of contacts online Free Blocking works Shows when contact is typing Cons:- Hate the 'Buddy' terminology. But thats a personal preference No sync with address book Not sure about interface Weird thing with groups Ugly icon Haven't sussed out the display names yet File transfers look as if they might work occasionally, but don't. At least there is scope for them though. Less sophisticated message view Anything to add? To be honest, I still can't decide!