Reviews

• JayIsGames (moar)
• GotoAndPlay
• Caiman
• Wikipedia (reclassified here)

Other review-ish sites

• Digg > Playable web games
• GamesOnTheWeb.blogspot.com

Flash game "portals"

• individual companies
  • Yahoo Games
  • Microsoft Games
  • PopCap
• Kongregate
• Miniclip
• Candystand
• more