Emily Denise at Very Emily regularly posts mind-blowing nail photos, but this is a style that looks fantastic but would be pretty easy (albeit time-consuming) to achieve. There's a tutorial at Unicorn Parade-- a good trashy TV watching project!
Here's another great look from Emily Denise: glitter over dark polish, but done in a really great way.
I am a big fan of Bronny's blog Fat Aus, and I've been lurking and reading her archives. I love these nails! There's a tutorial at The Dainty Squid. I'm really into triangles right now, and I really love the way this looks!
And back to the impossible: Emily Denise's butterfly nails. So beautiful!