Thermaltake 520w PST modular PSU
 

I think the mini PST is actually an excellent idea that enables you to connect other stuff such as lights and other accessories with out stretching the cables up to the PST or vice versa, it has 2 x 3 pin outputs, 4 x 4 pin and of course 1x 4 pin power input. I think the idea in this is so you could run the cable to the mini PST at the rear of the case to power a water pump for instance or a GFX card cooler...

Link: http://www.xtremecomputing.co.uk/review.php?id=204