Thanks for the compliments, ladies.
I wore my hair that way to work last night, but unfortunately it did slip as the evening wore on. This had more to do with the length of my hair than the design of the pins, so I'm looking forward to experimenting again when I have a bit more length.
Weird that so many people are having trouble finding these in stock. My Target had at least 10 packs. There must not be many crazy NC.com-ers in my area.