Perhaps it has though the OP may want to re-hash or get a more recent opinion on the subject. Or perhaps he hasn't used the search function, but why respond in an unhelpful way? It takes less effort for you not to respond and it's just as unhelpful. So for the sake of you and the OP, don't waste your time on a thread I presume you feel is a waste of your time.
As for the whole inter-breeding between Jar's and Asian's it won't happen in the near future. It's economically not viable for the industry, and lets face it that's the nature of the hobby and of business. Hybridization between fish that are already hard to breed would cost a significant amount of money. It may take more than normal farming perhaps even stripping and other costly breeding procedure's that make it not viable. Some hybrids take very little money to create. Smaller fish need less room and some will interbreed as freely as they would breed period. Examples would be flowerhorns and the like. Other hybrids such as Red-tail/Shovelnose cat's were created originally for the food industry I believe. Since the demand is much higher as food then it could ever be in the pet industry it is viable. The money is there for the investement. However a Jar/Asian hybrid may result in a undesirable fish to the pet industry. Also since it won't sell on the scale as a food fish the offspring would have to be ridiculously priced to offset the cost. A price most hobbyist wouldn't be able to afford making the demand even lower. All in all it would be most likely be a failed endeavor by anyone attempting it. At least that's my opinion. I could be wrong though.