Quake Online

I've read that it's possible to play Quake Wii online. But I was wondering how one would go about tying in an ipaddress without a usb keyboard to join a server (well if that is even possible of course)

It isn't that hard to make an onscreen keyboard with libraries. It also wouldn't be too hard to make a custom one with only numbers.

It's also not hard to integrate usb keyboard compatibility.

But as of now: playing online wihtout a usb keyboard is not possible?

It might be implemented.

Which version of Wii Homebrew Quake are you talking about?

Just QuakeWii

You don't need an actual keyboard to type, it's got an on-screen one. Hold down Minus to bring it up, then tap B to press the highlighted key.