Discussion around “bring your own device” is quite heavily focused into devices and whether those should be allowed or not. I think the key question is do organisations want to make their services available any time, any where. After answering yes to that question, it really does not matter any more who brings the device (naturally the security concerns need to be taken care).
I think that services that are openned to be available out side organzations office network are increasing productivity. They are not so weird thing either anymore as there are readily available services like salesforce.com and other real SaaS solutions also handling companies key assets: customer information. So why not consider similar approach for other services too?