A quick heads up from the Splash Damage frontlines. For those wondering if SD is looking into the unique GUIDs issue, here's a releafing note:

Just to let you know, we're looking into a few possible solutions to address the lack of unique guids in Wolf. It's still early days at the moment, but as soon as we have something workable, we'll alert the internet.

That's some good news, but nothing official yet.

Source: Splash Damage forums