Saw this attachment on a craigslist post (from a commercial advertiser) thought it was neat...
I'd have to way cost and advantage{or disadvantage} of something like this. The price may not be worth what it is actually capable of doing.
Ask the guys in the PowerTrac group about front mounted "backhoe" arms. They do dig but you don't have much depth and you need to move the tractor constantly to dump the spoils. As an occasional tool they would be useful I'd imagine.
I like my QuickSpade. The price is right and it takes a whole lot less time a d hassle to hookup than my BH for small jobs.
I can understand the quickspade, infact I noticed NT sells them, saw it in catalog last night, seems handy for smaller jobs. I was commenting more on the skidsteer front hoe.