Hacker News stories for 7 AM on Tuesday Dec 18, 2012

0.948 Using Scala to handle exponential growth at a startup comments

0.870 The Gates-Funded Toilet Of The Future comments

0.177 Tegra 4 leaked: quad core Cortex A15 CPU, 6x faster GPU comments

0.118 Wil Wheaton on Instagram’s new ad policy comments

0.102 Show HN (redesign) - Startup Threads Monthly: Startup Tshirt Subscription comments