APX is pleased to provide our current and prospective ERCOT clients with the latest ERCOT information and updates to keep you informed of the on-going market updates.

APX is the leader in hosted Scheduling, Settlement, SCADA, and Operational Support services for ERCOT and the nation's other power markets. We enable market participants to be up and running fast, with a low initial investment, full 24x7 service and support, and lower predictable on-going expenses.

• ERCOT Nodal Update
• APX Conference: "Redesigning the Future"
• Additional Market Updates
• Meet APX

ERCOT is currently in the process of Beta Testing EDS 1 (Early Delivery System). APX has participated in this Beta Testing with ERCOT to help them troubleshoot their ICCP point mapping with clients who are Level 3 or 4 QSEs. APX plans to install ICCP communications and test with ERCOT in June 2007.

All APX Clients benefit by having APX test this infrastructure on their behalf.

The rest of the EDS will be released in phases with pieces of functionality available for testing with ERCOT between July 2007 and July 2008. APX internal system builds will follow a similar schedule and will allow QSEs to test fully with ERCOT by July 2008. Until that time, APX will be handling the intensive testing with ERCOT to help identify issues in their systems.

However, there are still things beyond APX’s preparation that needs to be addressed by all QSEs. Are you comfortable knowing what your company needs to do to be completely ready to participate in the Texas Nodal market?

APX is committed to analyzing how the implementation of the ERCOT Nodal market will affect clients, and we are prepared to help you prepare for the Texas Nodal market. We would like to hear from you -- what are some of your concerns about the ERCOT Nodal Market implementation?

For more information about how APX can help you prepare your tactical and strategic plans for the Texas Nodal market, please contact Wendy Brown at 281.489.7633 and plan to attend the upcoming APX Client Event (more information below).

The Future of Power Markets in California and Texas

To receive the group rate, register at the Omni Hotel by May 6th!

The keynote speaker will be former FERC Commissioner Nora Mead Brownell.

APX is proud to host "Redesigning the Future", a strategy conference for power market participants in the CAISO and ERCOT markets. The event is planned for June 6 and 7, 2007 at the Omni Hotel in downtown San Diego, California. Nodal market changes require more than just a defensive play. By understanding the changes, you have an opportunity to turn them to your advantage.

Generation Companies, Load Serving Entities, and Financial Firms will:

• Learn how power market changes will impact your business
  
  
• Understand your choices, risks, and decision options in the new California and Texas power markets
  
  
• Identify specific solutions and approaches for these new markets structures.
  
  
• Learn how hosted solutions can reduce costs, increase security, and eliminate certain risks in power market operations

Register today for this exciting and informative event.

Also, if you know someone that is not currently an APX client but would benefit from attending the APX client event, please contact Wendy Brown at 281.489.7633 to have them added to the invitation list.

EILS
ERCOT will not implement the EILS (Emergency Interruptible Load Service) for the April 19, 2007 to May 31, 2007 contract period due to insufficient bid submission. ERCOT received a total submission of 156MW of Capacity for Business and Non-Business hours; however ERCOT has a procurement minimum of 500MW for program implementation. ERCOT will be accepting EILS bids up to the May 11, 2007 at 12:00 Noon deadline for contract period of June 1, 2007 to September 30, 2007.

RPRS
As of February 5, 2007, ERCOT has announced they have fixed their modeling issues with respect to LaaR participation. APX systems are fully integrated to support LaaR portfolios participating in the RPRS market.

Please contact Katherine Graham at 408.986.2204 to make sure your LaaR portfolio is set-up or if you have any questions on the EILS proposals. We can help market participants better evaluate the opportunities and implications of providing LaaR services including cost and revenue projections.

APX is committed to staying abreast of new market implementations and changes that effect market participants. APX will have a presence at the upcoming events. If you are planning on attending any of the conferences and would like to meet a representative from APX please contact Robert Douglas at 408.517.2129

April 30 - May 3, 2007
Twenty-Fourth Annual ERCOT Operations Training Seminar
Austin, TX

May 21 - 23, 2007
Carbon Markets Finance & Investment Summit
New York, NY

May 22 - 23, 2007
3rd Annual Washington Clean Energy Roundtable
Washington, DC - Ronald Regan Building Rotunda

June 14 - 15, 2007
4th Demand Response and Energy Efficiency
Washington D.C., - The Westin Grand

July 25 - 27, 2007
CMTA 2007 Energy Conference
Lake Tahoe, CA - Harvey's Resort