Company will provide Yahoo! with demand response services at its Northern California headquarters

PORTLAND, Ore., Jul 23, 2008 (BUSINESS WIRE) -- EnergyConnect, a wholly owned subsidiary of Microfield Group, Inc.
(MICG.OB), and industry leader in innovative demand response
technologies, today announced a partnership to provide demand response
services to Yahoo! Inc. (Nasdaq:YHOO), a leading global Internet
company.

During a demand response event, companies that have previously
committed to reduce their electricity usage are called upon to ease
the strain on the power grid by responding quickly and decreasing
their electricity consumption. By cutting back on its electricity use,
Yahoo! helps balance the electric grid by freeing up power it would
have otherwise been using, helping to prevent rolling blackouts, and
limiting the need to bring additional green house gas generating
plants on-line.

"Yahoo! is committed to environmental stewardship and we are
constantly searching for effective ways to decrease our carbon
footprint," said Christina Page, Director of Climate and Energy
Strategy at Yahoo! Inc. "We are pleased to partner with EnergyConnect
and see this important program as a complement to our larger
commitment to be an environmentally responsible company."

A steady rise in energy costs makes it essential for electricity
customers to find new and effective ways to manage their energy usage.
EnergyConnect's next generation demand response services enable a more
efficient and reliable power grid while creating additional revenue
opportunities for participating companies.

Yahoo!'s participation in the demand response program was off to a
good start on July 10, 2008 when the company responded to the call
from PG&E to reduce power consumption due to peak demand on the grid.
Yahoo! reduced electricity consumption at its corporate headquarters
and data centers in Northern California by 1 megawatt (MW). In total,
Yahoo! provided enough capacity to power approximately 750 homes.

"Reliable, active participants such as Yahoo! demonstrate the
significant role that demand response can play in meeting our nation's
growing energy needs," said Rich Quattrini, Vice President for
EnergyConnect's Western Region. "By participating in this program,
Yahoo! has demonstrated its commitment to the community and is helping
to alleviate the need to build expensive peaking power plants that
only run a few hours a year. We are pleased to have them working with
us on this important program."

Participation in the EnergyConnect emergency curtailment program
is just one of a number of Yahoo! energy initiatives already underway,
including:

-- Installing an interactive, real-time, building by building
monitoring system to track electricity consumption at its
Sunnyvale headquarters.

-- Using renewable power, hydroelectric energy, and passive
cooling to increase efficiency and reduce greenhouse gas
emissions at various facilities and data centers.

-- Developing an award-wining commute alternatives program that
offers incentives such as Wi-Fi enabled biodiesel shuttles and
generous public transit subsidies.

-- Launching several sustainability-focused consumer initiatives
including: Yahoo! Green, the most trafficked green website on
the internet, the Yahoo! Autos Green Center, and
18Seconds.org, dedicated to educating Americans about the
cost-savings and environmental benefits of CFL bulbs.

About Yahoo!

Yahoo! Inc. is a leading global Internet brand and one of the most
trafficked Internet destinations worldwide. Yahoo! is focused on
powering its communities of users, advertisers, publishers, and
developers by creating indispensable experiences built on trust.
Yahoo! is headquartered in Sunnyvale, California.

About EnergyConnect

EnergyConnect, a wholly owned subsidiary of Microfield Group, Inc.
provides industry leading Demand Response technologies and services
that enable a smarter, more sustainable power grid while creating
additional income for participating companies. The EnergyConnect
web-based automated platform enables consumers of energy to
participate in unprecedented incentive opportunities by cutting back
power when the grid needs it the most. Demand response is the
cleanest, most efficient and lowest cost solution for meeting the
nation's growing power needs. For more information about this next
generation technology, visit: www.energyconnectinc.com. For investor
information, visit: www.microfield.com.

SOURCE: EnergyConnect

EnergyConnect
Media Contact:
Kate Casolaro, 617-443-9933 x 338
kcasolaro@rasky.com
or
Investor Relations:
Randy Reed, 503-419-3580
CFO
or
Yahoo! contact:
Kelley Benander, 408-349-4072
kelleyb@yahoo-inc.com

Copyright Business Wire 2008