To start something like Web Inspector.
Most browsers implement the UI for these using web technologies, in part to say "look what we can accomplish!" And my goal with Memex is to show that my controversial decisions don't have to loose that.
But also these tools are extremely helpful to fix webpages and explore alternate designs. I don't want to loose that.
But most importantly they communicate a very read/write vision for the Web I want to amplify.
For people who care about, support, or build Free, Libre, and Open Source Software (FLOSS).