Mitch Kapor's Weblog: "Caveat altert: In a transitional era like the one we are in now, it is notable that it's harder to convert a code base developed in a proprietary context to be open source than it is to start from scratch for the same reason renovating a house completely is harder than new construction. Trust me if you haven't been through this. I have. This is one of the reasons it took seven years from the day Netscape announced it was going to open source the Mozilla browser to get to Firefox 1.0."