AppJet’s EtherPad, the real-time Google Docs-like wiki tool that was recently upgraded to become more collaborative, has launched an uber-cool tool that definitely worth a look. Called the "Time-Slider," the feature lets you see the complete history of a document's evolution. Here's how it works. EtherPad keeps track of all your typing in realtime. At any time during the course of typing a document on EtherPad, you can click on the "Time-Slider" button that will play an animation of your document to see how it evolved over time. The tool also features a timeline where you can click into any stage of the document and see the evolution from that point. You can also create "bookmark" in the document's timeline to mark certain points during the evolution of document that you'd like to go back to. Time-slider is a really interesting tool, if only for the nifty screencast of your document's evolution. But seriously, when it comes to collaboration between several people, the time-slider could be useful to see how a particular document took form. TechCrunch50 Conference 2009: September 14-15, 2009, San Francisco