Continuation of below post that I could not get to add..

ON THE OTHER HAND, since many breeds are no longer used in the capity for which they were designed, many have moved into creating new types that would be appealing to the companion role that most are in.   I would hope that those who do develop these companion dogs DO have a good handle on the genetics, both Phenotypically and Genotypically.  This seems to be the case with the folks who breed the Australian Labradoodles and they seem very informed and do offer lifetime support to their breed.  That is commendable and deserves my respect.  Since Terriers were bred as warriors or varmint dogs, that requires a certain amount of agression and by adding softer, more docile breeds, that gives them a better chance of becoming the great family companion dog that this country is geared for.

  I do find the crosses interesting when they happen to create something very appealing but what do you do with the ones that aren't so appealing from those who have no idea what they are doing?   Will there just be more of these mixed breeds ending up in shelters at the hands of the un-informed who just want to make a quick buck?

That is the multi thousand dollar question isn't it?