Apple Watch pre-orders sell out, the new Apple MacBook and Samsung Galaxy S6 are released, critical security flaw in OS X 10.10.3 gets patched, Twitter is pushing for celebs to stop using Meerkat, Hillary Clinton hires Google executive to be CTO, how the Russians might have hacked the White House, Mark Pincus returns as Zynga’s CEO, Lynda.com gets purchased by LinkedIn, self-driving car makes it across the country, EFF busts podcasting patent, and more.