A startup uses strains of E. coli bacteria to convert sugar into valuable chemicals for textiles and other products.
Virtualization and data-management companies still show potential.
Advances could at last make the high-energy batteries practical.
Venture-capital investing remains slim, but some momentum is building.
Ksplice uses new technology to build security updates for Linux that can be installed without restarting.
Startup Enphase Energy is shrinking DC-to-AC inverters to extract more juice from solar panels.