If this is true, looks like the sale will be 11 days. A list of the indie bundles has been leaked but take it with a pinch of salt for now.
Day 1: Anomaly Warzone Earth, The Baconing, Cave Story+, EDGE, Lone Survivor.
Day 2: Botanicula, E.Y.E, Oil Rush, Splice, Universe Sandbox,
Day 3: Bit Trip Beat, Braid, Bunch of Heroes, Insanely Twisted Shadow Planet, Runespell Overture,
Day 4: A Valley Without Wind, Atom Zombie Smasher, Blocks that Matter, Sanctum, Superbrothers: Sword & Sworcery EP,
Day 5: Audio Surf, Gemini Rue, Greed Corp, Tiny Bang Story, Ys: The Oath in Felghana
Day 6: Awesome, Defcon, Space Chem, Ticket to Ride, Trauma
Day 7: Avadon, Dungeons of Dredmor, Qube, Vessel, Zombie Driver
Day 8: Demolition Inc, Hoard, Sol Exodus, Swords and Soldiers HD, Wings of Prey,
Day 9: Capsized, Jamestown, Revenge of the Titans, VVVVVV, Zeno Clash
Day 10: All Zombies Must Die, Beat Hazard, Bit trip Runner, Eufloria, Machinarium
Day 11: Hydrophobia, Orion: Dino Beatdown, Star Ruler, Waveform, World of Goo