I got a chance to use the auger I bought today. It worked really well for drilling individual holes, but I didn't fall in love with the method like I thought I might. It drilled all the holes really fast, but I ended up stooping over to make sure all the seeds made it into the holes. If you had a partner, this method wouldn't be too bad. One guy could dig and the other could plant.
While playing around this morning, I did find another method of planting with this auger. I used it as a cultivator instead of a drill. I just kept putting it into the soil and breaking up the top layer in each section. Then I did like before where I spread the seeds out and stepped on them. The good news is that it takes two minutes to break up a 4'x4' square if the soil is good. If the soil is hard, or it's full of roots, it takes closer to five minutes to break it up. I had all three kinds. The drawback to this method is that my drill batteries only let me get about half the plot done. Also, it did a great job of tearing right through all the small roots, but if you hit a big one, look out because that thing can be a wrist breaker!
I don't know how well you can see the difference in the photos I took with my cell phone, but the first picture is the 4'x4' square before I cultivated with the auger, and the second is after I worked it up.