CALGARY – Shaw will offer $500 million principal amount of 5.50% senior unsecured notes due in 2020, as well as re-open its offering of 6.75% senior unsecured notes due 2039 for an additional $400 million.The net proceeds of this offering will be used for repayment of debt incurred under Shaw's credit facility to complete the acquisition of the broadcasting assets of Canwest Global Communications Corp. and effect a subsequent related debt refinancing.Closing is scheduled to occur on December 7, 2010 and, based on the closing purchase price, the effective yield of the 2020 notes and the 2039 notes, if held...