OK, powergyoza, you're gonna have to bring that thing over here & we can go crazy with measurements for an afternoon...
That would be great! It's not very easy to find that information. Some units have information written on the labels (for instance, a 40GB Fujitsu HD label say "Rating 12V 0.4A 5V 0.5A"), but far from all components have the information so easily available. And even if they have, it might not be easy to find out before it is bought.
It is important information for large PCs, but maybe even more so for small computers. How much can you put inside a computer with 200W PSU with 3V 16.7A 5V 21A 12V 10A (13A peak)? Obviously not dual Athlons
but I've never seen a microATX or miniITX board with dual Athlons either
But seriously, the above mentioned data is one of the most powerfull microATX PSUs.
And what about the external 55W PSU used with many mini-ITX computers? I asked mini-itx.com, and they told me that they doubted it could run the EPIA ME6000, a 3.5" HD and a full sized CD-ROM, but I don't now if they had tested it or not.
A collection of data for at least some units would be very nice!