If you like electronica, you may enjoy Shiny Toy Guns or Freezepop. Also, I'll add that indie music just means that the artists are independent of labels, so even NIN and Radiohead are indie bands. ;p I feel that it's impossible to say anything definitive about indie because there's indie folk, indie rock, indie country, indie jazz... You never know what you'll find. :-)

Now, those hipsters and hipster bands... THEY are what I don't like. I'm an indie music fan because of the creativity, but I stay the fuck away from the hipster camp. :-)