Social Media Icons

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Across
  1. 1. - Music discovery
  2. 3. - Blogging community
  3. 4. - Early social network
  4. 8. - Professional network
  5. 9. - Google's first try
Down
  1. 2. - Tom's platform
  2. 4. - Photo sharing site
  3. 5. - News aggregator
  4. 6. - Tagline: "Who's in?"
  5. 7. - "Aol's" network