kishy, have you used any PS/2 to USB adapters that didn't reset (i could assume an adapter without an extension would not do this "reset" crap) ?
((what i mean by 'without an extension' is an adapter that goes straight from PS/2 to USB like a tiny cylinder not the connector, cord, middle-thing and then usb))
USB to PS/2! lol.
You're not adapting the keyboard to USB...you're providing PS/2 emulation over USB. Thus, USB to PS/2, much the same way a PCI VGA video card would be a "PCI to VGA" adapter card.
As for this "without an extension" stuff, I don't think that makes a difference. It is possible that extra wire length would increase resistance enough to make the electronics unhappy, but that's a long shot with such a short wire length.
The blue cube is very good but
I have yet to experience problems with the one-dollar-with-free-shipping ones...If you don't like experimenting with stuff, just go blue cube. Spend a few more bucks, get something extremely likely to just work, but if you're like me you'd kick yourself for not trying every other option as well. Recommended: USB extension cord, if only a few inches. Blue cubes were designed by some kind of moron who didn't think USB ports are normally beside each other.