About 80% chances are Project M team are going to use their own server. Well, their new version is going to be released in December 2014, which means the online features will be unusable unless they make their own server. However, it won't hurt to tell them.
On the other hand, I think we should avoid telling well known Nintendo blogs. There are chances that someone is going to tell Nintendo, or it's going to be posted in Nintendo's official blog. We don't want to create the risk of getting 'cease or desist' from Nintendo.
You've got a point there, maybe we could spread the info via well known home-brew communities or by implementation in popular Home-brew apps (HBC, Usb Loaders,Wiihacks, Ocarina, Wiibrew?) but not too mainstream?