I spent my Saturday at minnebar along with 1,200 other techies. While most of the concepts and technologies reviewed were not in my area of expertise, they all made me think. It is all too uncommon an occurance when we take the time to actually really sit back and reflect ... to think.
One of my faorite sites over the years to get quick doses (or long) thinking inspiration is Stanford's eCorner. Thought leaders from Silicon Valley present (free video or audio) on their ideas.
Here is one of the leading venture capitalists, Geoffrey Moore. You can watch 1 minute and 47 seconds on "When Big Companies Get Stuck" (follow link for excerpt ... full presentation is given below)