This week I picked up 2 of China Glaze's Holographic Colors at Sally Beauty Supply ($6.59) this week - their colors were really picked over but I was able to get "Don't be a Luna-tic" a light teal color.
As you can tell from the bottle shot it doesn't look very "holographic".
You can see a little bit in the swatch above - but for the most part you cant see a strong "holo" unless your under bright Halogen or "real" daylight.
In the picture above on the right is "indoor" lighting and the left my light box with "daylight lamps".
So it's a so-so holo nail polish, but it is much more easily available than most holo polishes.
Have you tried any of the China Glaze Holographics yet?