Please post comments if you are seeing more of this happening, either in presentations your are seeing from agencies, or in what your agency is preparing for clients. No need to mention specific company names.
On a related note, our upcoming Career Guide includes a roundtable discussion with top HR people, and one corporate executive, on the challenges of recruiting mid-level staff. Social media is becoming a significant recruiting tool for companies. Not a big surprise, but in the ongoing battle for top talent, it will be interesting to see how differentiating a social media strategy can be.