Have you tried Nimbuzz, it's European. It supported, ICQ, MSN, Skype, Facebook, GTALK(Jabber), IRC, (Love to see SIP support) and offered outgoing calls. It was pretty amazing, then the other players attacked it.
Still good, works Windows, Linux, and is available for Android (probably iPhone). Hope it works out for everyone.
It's sadly not open source ATMM.