Upgrade from CIC0 to CRM IC Web - is NetWeaver XI required?

Hi,

I have a customer who is looking to move their processes from the customer interaction centre (CIC0) in the SAP GUI to the CRM 2007 IC WebClient. They have upgraded to ECC 6.0, but do not have NetWeaver in place today, so they have asked whether this is required for the implementation of CRM. Do I correctly assume that the CRM middleware concept has not changed (ie it still uses BDocs) with CRM 2007? Also, can you please confirm whether XI required for them to move to the CRM 2007 IC WebClient?

Thanks

Janine