The title is Hitch 22 and it appears it will be released this June. He apparently has a whole chapter on Salman Rushdie, and one Amazon reviewer recounts this:

he tells of accusations against him of turning on his friend, edward said, at the time said was on his death bed. his account will have him appear as an apologist to his detractors, but there’s no way he can avoid this. [Saul] bellow, of course, was baiting him in manhattan, not only with the magazine with the article about edward said, but also by drawing hitchens out with a question about wordsworth’s political persuasion.

That all sounds about right. Perhaps to market this book Hitchens will be prompted to blog, if even temporarily. His writing often reads like, and sometimes is, correspondence -albeit an entirely overwrought correspondence- which would lend itself to blog form.