Here is a new design for a power strip from Kreative Power. It’s called a Powramid and should be available for purchase in February. The idea behind the Powramid is the create a six-plug power strip oriented so all the plugs can be used at the same time.
I will definitely get one of these for my road bag. During our recent trip I had a standard power strip for two cell phones, two MP3 players, a computer and a set of external speakers. Because everything except the computer had a large power adapter, we could only plug about half of the devices in at a time. The problem has been solved.