Sadly it looks to be the case that PowerEdge USA is closing (as mentioned in the forums):
We at Power Edge USA have had a very enjoyable opportunity serving all of our customers throughout these years. However with the changes in this industry and an economic down turn within the past few years we have come up with an unfortunate and sad decision. We at Power Edge USA will be shutting down our website (E-Commerce business) known as Power Edge USA. The last day that we will accept orders will be March 13th, 2008. The last day we will be physically shipping out parcels will be March 14th, 2008. All AEG warranty policies (if any) will be honored via our sister storefront Power Edge Hawaii. We would like to sincerely thank each and every devoted customer, fan, affiliates, and those whose lives we had the pleasure of affecting. Any product warranty issues or follow up after March 14, 2008 must be addressed via our sister storefront Power Edge Hawaii.PowerEdge USA