Moving on however, I think that wireframes are best done as a team with good communication between the BA, IA and the Designer as everyone needs to understand and interpret the brief from the client. In cases where the IA is also the designer, this is not so much a problem.

I do agree that wireframes need to take the client and context into perspective as lo-fi wireframes are not useful in all cases as clients cannot always visualise the final product. Combined with hi-fi wireframes, they might prove to be much more useful to the client. The key is to effectively communicate what you are trying to visualise to the client in whatever form that is manageable and understandable for them.

Nice follow up to http://ux4dotcom.blogspot.com/2010/01/why-and-why-not-wireframing.html