Think this is an excellent idea.
I think physical proximity to your team is important. Cuts down on the requirement to have meetings and you don't need to store up questions as a lot may be answered the minute they arise.
Can be useful when the team first gets together varies from person to person some are very good at using phones / skype.
I even like using communicator for quick questions (both asking and answering), however, at some places they see one person abuse it and remove from everyone. There will always be abusers but that shouldn't invalidate it as a good business tool.
There have been plenty of studies on team communications. I would like to see how this fits in with current thinking in that area.
-- Stop your grinnin' and drop your linen...they're everywhere!!!