I think the Sony hot shoe is a lame excuse it's not like I could enter change my Sony and Nikon flashes even if they did fit.
Actually... you could. You can, for example, mount a Canon flash on a Nikon, or a Pentax, etc. but the catch is you'd have to use the flash in "manual" mode (no E-TTL or iTTL, etc.) That's because the industry-standard for the hot-shoe design is that the electrical contacts that matter are the ground plate of the foot (sometime the foot is plastic in which case they usually put a metal contact on it so that it conducts the signal into the metal "shoe" on the camera body) and the center pen. When you close the circuit between the center pen and the ground plate, the flash will fire manually.
The rest of the pins control the added features of the flash. For example... the original "automatic" modes merely told the camera to set a specific f-stop and that was it. Internal to the flash was a sensor that measured the reflected light and killed the light as soon as enough reflection had been received. It worked, it was automatic, but it was also easy to fool. The industry went through several iterations that improved automatic flash to arrive at the systems we have today. BUT... most studio flashes are still manual.
So if you want to use a wireless radio flash trigger (Pocket Wizard, etc.) you can get these for Canon & Nikon... but as far as I know, you can't get one for Sony.