Sounds great. I can easily see this as a a fun little thing for family and a serious thing for the business world. however....
If Apple can't get a client for the windows world then this is once again a spectacular product that i can't make use of because no one i know has iChat. More people are getting macs but not enough to make something like this to be integrated in to my workflows. It is tough enough to get a person to download and use a new app. It is many times more difficult ot get them to switch platforms all together.
Long story short where is the iChat client for Windows? Where is the partnership with Google to better hook into GoogleTalk?