waderoush writes: If Silicon Valley is in a bubble — which it is – how will it finally burst? Where is the bubble’s membrane being stretched so thin that it’s in danger of tearing open and letting the real world rush in? This commentary from Xconomy picks five real places around the San Francisco Bay Area embodying tensions, imbalances, injustices, or dangers that could escalate into a show-stopping crisis for the technology economy. One is Bank of America’s former headquarters in the heart of San Francisco’s Financial District; another is an elementary school in Oakland that happens to sit on the Hayward Fault. ‘If we can identify the fractures that threaten to destroy the innovation machine, we might be able to patch them up and keep the system going for a while longer — and maybe even point it in a smarter direction,’ the piece argues.