- TinkerCAD’s web-browser-based solid-modeling beta opened; participants noted it only exports STL files and questioned the depth of its modeling capabilities.  
- Google announced the shutdown of Google Video on April 29, 2011, prompting discussion about the risks of relying on free web services for long-term data storage.  
- The CubeSpawn open-manufacturing project was linked (CubeSpawn.dia diagram), with criticism that its documentation is poorly layered and hard to edit.  
- Marcin Jakubowski’s Open Source Ecology project appeared on Slashdot again; participants lamented the continued absence of any reference to SKDB or component-level versioning in the RepRap ecosystem.  
- A high-resolution scan of the cyberpunk manga “Blame!” was shared on the channel’s file server, along with discussion of its early chapters’ loose connection to the main plot.  
- OpenCASCADE’s codebase was dissected; frustration was voiced over its opaque B-rep Boolean operations and the difficulty of finding clear literature or approachable source on NURBS-to-NURBS math.  
- A list of early OpenCASCADE/Matra DataVision developers was circulated in an attempt to identify the original author of the core B-rep engine.  
- RS Components’ eTech magazine open-hardware article was mentioned, but the PDF link was found to be broken or malformed.