Bill Gates gave a few clues about the issues he'll be talking about during a series of events with college students across the country "How do we get the best minds, including young people, working on the biggest problems – poverty, global health, education, energy, and climate change?" the Microsoft chairman wrote in a short preview on the Gates Notes, his recently launched site. He called it "an issue I’ve been thinking about a lot lately." The Berkeley speech starts at 11:15 a.m. Pacific time today, and it will be available for live viewing online in a variety of places, including Gates' Facebook page. The event at Harvard later in the week will be available for viewing at noon Pacific time on Wednesday.