How is it difficult? These are all standard fields needed to connect any generic SIP client to a SIP service provider offering VoIP, IM, etc.

If you want something idiot-proof where you only need to input your username and password, Gizmo might do it for you, but that's because their settings are hardcoded into their client. Operative word here is 'their'. If Nokia ran their own SIP service, it would be easy as well.

Also, if you did a search for the Instant Messaging Updates, you'd know that RTCOMM Beta does offer an almost idiot-proof way to set up your account, although YMMV

That statement was like saying that Nokia are idiots because they make setting up a mail account difficult by asking you to fill in over 10 fields