With my usual optimist hat on, I think this is a good thing.
I’ve long been disappointed that the major search engines treat non-US territories with the same rules, even though laws differ. The case of PPC for example: Google don’t allow gambling ads, anywhere, but that’s based on US legislation. In the UK, they could legally allow them if they wished and their US-centric policy is holding the industry back in areas where it is/will be properly regulated and controlled.
Yahoo doing this tells me two things: firstly, that they are prepared, and able, to distinguish between laws in localised jurisdictions, and secondly, that something like this can only help the profile of the gambling industry in the public sector. It helps to bring some more credibility to the poker market at the very least.
Just my £0.02.