- Participants explored building a $10 DIY version of Patrick Flanagan’s “neurophone,” an ultrasound transducer that transmits audio through skin contact to the inner ear, and brainstormed a silent “skin-rave” where linked wearers share an inaudible soundtrack.  
- The neurophone thread led to ideas for tactile VR: submerging ultrasound transducers in water or gel to create mid-air haptics, potentially integrated with Jeff Han’s GPL-licensed 8×8 LED matrix multitouch sensor that uses reverse-biased LEDs as light sensors.  
- Plans to overhaul the Gada Prize criteria were discussed, including dropping unrealistic goals like “print a 6-sided PCB in 20 minutes” and “self-replicate unattended in 10 days,” and setting up an impartial registration system separate from the RepRap wiki.  
- Synthetic-biology risk examples were compared: Germany’s rapid Ebola-vaccine response versus the 2006 TGN1412 monoclonal-antibody trial that caused catastrophic organ failure, highlighting the need for improved first-in-human safety protocols.  
- UV-irradiated mushrooms (portabella, shiitake) can deliver 50–100× more vitamin D (up to 460 IU/g) than untreated varieties, offering a low-cost DIY fortification method rooted in 1920s Steenbock rodent-chow experiments.  
- The Canadian Cancer Society now recommends 1,000 IU/day of vitamin D—five times the official government guideline—based on emerging cancer-prevention evidence, while eggnog was noted as a surprising dietary source at 123 IU per serving.  
- Participants lamented the USDA nutrient database’s non-REST POST interface, which prevents stable Wikipedia links to specific food reports without reverse-engineering form data, and toyed with the concept of an on-demand service that compresses all personal supplements into a single daily pill.