Just as an aside (I watched your video and was quite impressed, but I haven't used it yet), it might be worth working with photoshop rather than against it. I c

Just as an aside (I watched your video and was quite impressed, but I haven't used it yet), it might be worth working with photoshop rather than against it. I could imagine your tool being used to rough something out, and being able to export to png/jpg (which you already have) or psd for some more serious editing or to be sent to a web designer. It's not anything I'd worry about in the short term, but it might be a nice differentiator.