No, it is not worth it. I think it is not just hype though, you do learn valuable info especially if you are new to the industry or don't know much about sourcing.
Ask your clients, see what they say. They will probably say a CIR, what exactly is that or so what? The most common competency question I get from clients is "who else do you work with that I know and respect?"
I have 2 CIR certifications, I have been to 2 of Shally's seminars & had the honor of seeing Glenn in action. Always take up a chance to see Shally or Glenn, stick with the cutting edge webinars. You will spend less money and get more current information.
And always be on the lookout for new info, no matter who is the evangelist. I have learned more from Michael Marlatt this year than anyone else, because he has turned me on to some awesome productivity tools that save me time and I had never even heard of him 3 months again.
There is no shortage of talent around here, also keep an eye out for webinars by Geoff Peterson and Donato Diorio, you won't be dissapointed.