Wow, there’s a really hot women’s TV rivalry happening. (I’m not going to use the sexist term ‘catfight’. I reserve that for bitchy male moguls who squabble…) First there were WE, Lifetime and Oxygen. Then the CW became estrogen-centric. Now Oprah’s joint venture with Discovery for her own cable network to debut in 2009 in 70 million homes is creating even more competition. I’m told Mario Grasso, the former WB network exec who was hired by Suzanne Daniels to be SVP of series development at Lifetime, would report to OWN’s recently hired president Robin Schwartz who used to be head of Regency Television. Last week I reported first that JoAnn Alfano was named Lifetime’s new EVP. I’m loving all these coming and goings… especially if it raises the female execs’ pay.