orSwitch and DataChris Reid Copyright Business Wire 2009

They simplify network provisioning with one source to identify,evaluate, order, provision, maintain and pay for both their data center andbandwidth services. The SingleCNXT-i service is carrier-neutral, a customer canview all participating providers in a site and select the service that bestmeets its needs. The program also gives customers access to negotiated ratesfrom multiple competing providers, potentially lowering interconnectivityexpense. SingleCNXT-i is available from T-1 to OC-n via copper and fiber, and atEthernet speeds from 1 to 100 Mbps plus Gig-E. "Working with Switch and Data enables XO Communications to easily offer our highspeed Internet access services to more customers that need fast Internetconnectivity nationwide," said Don MacNeil, Vice President of XO CarrierServices. Switch and Data was founded in 1998 and its carrier neutral sites are the mostdensely interconnected data centers in North America. Some of the network service providers whosell their services in Switch and Datas SingleCNXT-i program are Cogent,Datagram, Electric Lightwave, e-xpedient, Level(3), Limelight Networks, NTT,PCCW/BTN, Qwest Communications, Reliance Globalcom, Savvis, Sprint, Unified WebHosting, and XO Communications.

About Switch and DataSwitch and Data is a premier provider of network-neutral data centers thathouse, power, and interconnect the Internet. Leading content companies,enterprises, and communications service providers rely on Switch and Data toconnect to customers and exchange Internet traffic. Switch and Data has built areputation for world-class service, delivered across the broadest colocationfootprint and richest network of interconnections in North America Switch andData operates 34 sites in the U.S. and Canada, provides one of the highestcustomer satisfaction scores for technical and engineering support in theindustry, and is home to PAIX - the world's first commercial Internet exchange.For more information on Switch and Data, please visit SingleCNXT is a registered trademark of Switch & Data Facilities Company, Inc STC AssociatesKristen Massaro, 212-725-1900 ext.

orSwitch and DataChris Reid, Copyright Business Wire 2009. BALTIMORE(Business Wire)Constellation Energy (NYSE:CEG) today announced the appointment of Carim V.Khouzami as executive director, investor relations His appointment is effectiveimmediately. Khouzami, who most recently served as director, corporate strategy anddevelopment, assumes responsibility for Constellation Energys investorrelations function, reporting to Jonathan W. Thayer, senior vice president andchief financial officer for Constellation Energy. "Carims solid understanding of the energy industry, strong background incorporate strategy, and exceptional financial and business acumen will provebeneficial in this critically important function," said Thayer.

"Carim possessesthe analytical and financial communications skills necessary to effectivelyarticulate Constellation Energys business strategy to our investors." Khouzami, who joined Constellation Energy in February 2005, succeeds Kevin W.Hadlock, who was recently appointed chief financial officer for ConstellationEnergys subsidiary, Baltimore Gas and Electric Company. Khouzami has served asa director in the corporate strategy and development group, where he has beeninvolved in merger and acquisition activities, including acquisition duediligence and strategic analysis, and the treasury group, where he worked on thefinancing framework for contemplated transactions and capital projects andperformed other treasury-related analysis. Khouzami earned a masters degree in business administration from ColumbiaBusiness School and a Bachelor of Arts degree from Vanderbilt University. About Constellation EnergyConstellation Energy ( ), a FORTUNE 125 company with 2007revenues of $21 billion, is the nations largest competitive supplier ofelectricity to large commercial and industrial customers and the nationslargest wholesale power seller.