I'm commenting on tracks on SoundCloud via their HTML5 interface on my Android phone. If I hear something I like I'll save it to my pinboard where ifttt can automatically cross-post it to my Google+ then save it to my dropbox. I use MacVim for everything, especially modifying my .dotfiles. I build everything server-side on top of my homebrew-installed node.js server while everything client-side is built on backbone using precompiled CoffeeScript and SASS. There would be a punchline but I'm waiting for an async callback.