One dies - never to be replaced.
My scanner's switchmode power brick made a resonant and smoky exit from this plane just to celebrate being three weeks out of warranty. Fortunately, a PSU sourced 12v via a spare molex ide hard drive connector not only feeds the scanner happily, it seems to have improved it! The scanner not only stopped sulking on odd occasions, it switches off when the computer is off. Murphy did me a favour. Now, what else can I feed from there? 6 bricks to go, so does anybody want some surplus bricks with their leads cut off?

Macca: sounds like a good idea that. Seen single output multi-voltage units but not multiple output ones...

I had a similar issue, but bought a 240V power supply on Trade Me that outputs 3,5,9 and 12VDC. The supply has multiple outputs of the above voltages and the peripheral devices that use adaptors can all be hardwired directly to one supply. I installed the transformer into a electrical enclosure, added 12V cooling fans and the thing has worked a treat for 6 months.

Eubiq sell adaptors to accommodate bricks that cannot be rewired because of voltage stepping, etc.
For me, the big thing is that you can plug anywhere on the track - but it does nothing for the various types of bricks available.

Yeah, I have adapters with 4.5, 4.7, 5, 5.2, 5.5, 6, 7.5, 9, 12, 15 and 20V DC and AC. Different polarity and size plugs of course.

The Eubiq Powertrack looks very cool, but I wonder how well it'd work with powerbricks that have the mains prongs directly on them? Nice design though.

It would be nice if they would standardise on one voltage, or have internal regulation. I have installed a couple of outlets on a spare blank PCI plate for one of my computers so 5V and 12V are there.

And the "standard" power connectors need to be sorted too. Apart from the different diameters, and lengths, of the cord sockets, there are a number of pin diameters. Then you have AC, DC with positive pin, and DC with negative pin.

But rationality will never happen. This is the "market". :(

The Eubiq Powertrack is what you want - (http://www.eubiq.com). Plug up to 16 devices per metre of track - anywhere on the track.

It's also what I wanted about 4 years ago when renovating.
Before I knew of this product I described the exact thing to the builder and electrician and anyone who cared to listen. Everyone said "No, no, there's nothing that can do that."
I was blown away when I saw it at the Auckland Home Show last year. *Sigh* - if only I had patented the idea.