Unable to use SVG in Lightning Components with LockerService activated. Can you help?

SVG support along with document.createElementNS() is coming very soon - already in a scheduled patch branch. I'll double check on the release date but I believe it deploys tommorow night. We've filled in many other gaps in the secure virtual DOM API with more on the way in following patches. Please pardon our dust as we get this dialed in over the next few weeks and definitely keep letting us know when you hit missing methods/properties.