Folks from Makerfaire: Here's a link to the Instructions for Making DIY Microbial Media (the homebrew petri dishes) and Isolating Bioluminescent Bacteria! Give them a read through, and let me know if you try them and what results you got! Take care! I've just returned this evening from Makerfaire: Newcastle. I had an amazing time, and I was thoroughly inspired by the people I met there and the things they're doing.