Apparently you can dig it! With this product that is. This connects to your standard drill and is used to literally dig in the dirt etc. The soil that was used in the demonstration was very soft and easy to work with so I am not too certain if this will work well in clay soils but it never hurts to try. The patent is still pending on this product but this is certainly not your grandmothers mixer.
A few blurbs from the official site.
Digs perfect, precise holes
Use for lines, curves and pattern plantings
Works up to 1 gallon plant size
Does not puncture, pull or tangle drip lines
Fits any drill
So if you have something small to plant than this might just be the right fit for you.