Not a real client on the Mac. Just a Fluid-like (Fluid-based?) wrapper app. Don't know about the iPhone.
The real test of Wave's openness is going to be whether a client can realistically be built by a third party.
Right now some people on the semi-public Wave server are discussing defining the client/server protocol, claiming that Google is open to such a third-party definition. I'm very skeptical that Google is actually open to such an approach. It sounds more like rampant, uninformed speculation.
(What's running right now at Google is just the same Java-based, protobuf-based communications code on both the server and client, with a GWT version on the client.)
The real test of Wave's openness is going to be whether a client can realistically be built by a third party.
Right now some people on the semi-public Wave server are discussing defining the client/server protocol, claiming that Google is open to such a third-party definition. I'm very skeptical that Google is actually open to such an approach. It sounds more like rampant, uninformed speculation.
(What's running right now at Google is just the same Java-based, protobuf-based communications code on both the server and client, with a GWT version on the client.)