Multiprotocol IM Clients

On the PC:

Digsby - can be made semi-portable via http://www.mcsoft.online.fr/madcow/?Ninja-Digsby.html

    Facebook

    GMail

    Google Chat

    Twitter

    Linked-in

    NOT Skype

Trillian - I didn't see a portable

    Facebook

    GMail

    Twitter

    Skype

    Google Chat

    NOT Linked-In

Meebo - doesn't do Skype, LinkedIn, or Twitter

On the iPhone:

    Beejive - does Google Talk and Facebook

    ?