As one of things that indirectly started the "prohormone" industry, DHEA kind of got left by the wayside in many circles as more potent (T precursor) compounds came into play.
As its concentrations do fall with age, I think there may be something to DHEA in its own right (prior to any conversion). The first paper I ever looked at on DHEA, ages ago, resulted in fat loss among the experimental subjects. I don't think this has panned out much, though. But since then I've seen interesting work done with lupus patients (autoimmune pts.) as well. The simple concept of replacing a relative deficiency would increase it's potential for effects.
I don't intend to supplement it myself but I think it's worth digging through some literature when making one's own decision.