Ah yes, Dribble. I've borrowed some UI ideas from them in the past. But I was thinking about actual UX things, not pixels. I like to see how things work. How does a user flow function? What elements (dis-)appear, when and how. How does the website/webapp/iOS App function? You know like 'pull to refresh' idea. A showcase of great functionality.
http://codepen.io/ has evolved to something like that. Live samples, likes and looks, and a code viewer.
YES! Thank you. It's not exactly what I was thinking about but it is close. Bookmarked!
I wouldn't say work on Dribbble is necessarily best practice. Many of the shots are just concepts by people who care more about "pretty" than how functional and realistically useful they are in the wild.