The Deal Blogs has an article providing a listing of Khosla Ventures' portfolio companies based on a recent speech by VK. Most of the companies are based around the general themes of making coal, materials, efficiency and oil more efficient. Then, he further refines them by grouping his investments according to the type of energy that the portfolio companies are trying to improve or harness. Here are the specific investment themes and companies that fall into each category: 1) Cellulosic - Mascoma, Celunol, Range Fuels, 1 stealth startup 2) Future Fuels - LS9, Gevo, Amyris Biotechnologies, Coskata Energy 3) Efficiency - Transonic Combustion, GroupIV Semiconductor, 1 stealth startup 4) Homes - Living Homes, Global Homes 5) Natural Gas - Great Point Energy 6) Solar - Stion, Ausra 7) Tools - Nanostellar, Codon Devices, Praj 8) Water - 2 stealth startup 9) Plastic - Segetis, 1 stealth startup 10) Corn/Sugar Fuels - Altra, Cilion, Hawaii Bio Arun...