The fourth-ever SketchUp 3D Basecamp will take place October 15, 16 and 17 in SketchUp's hometown of Boulder, Colorado. 3D Basecamp is a gathering for 250 (or so) SketchUp enthusiasts to meet, learn and be inspired by one another. It's also a seriously good time; this recap video from 2010 sums the event up pretty nicely. This year's 3D BaseCamp will focus around plugin development for SkwetchUp - let's face it; without these plugins SketchUp would not be any near to what is today. The keynote speaker will be Bre Pettis (co-founder and CEO of Makerbot Industries).