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Got an idea involving loyalty or rewards, mobile and online payment management, or security and fraud detection? AmEx may want to talk to you

Got an idea involving loyalty or rewards, mobile and online payment management, or security and fraud detection? AmEx may want to talk to you. American Express is getting into the venture capital business – and it's not starting small

Google+ is nowhere near as big as Facebook and Twitter... yet

Meet Siri. She'll write your emails, check the weather, update your calendar--and potentially disrupt the way future customers find your business.

In the wake of Airbnb's home-vandal scandal, start-ups in the collaborative consumption space are rebuilding peer-to-peer buying's reputation. Here's how. Airbnb found itself in a public relations nightmare this summer that threatened to undermine its whole ethos of amiable and unique person-to-person connections

What worked well for your company yesterday may not be the best today. Make sure you're getting the best results by putting various parts of your business to the test.

What worked well for your company yesterday may not be the best today. Make sure you're getting the best results by putting various parts of your business to the test. You go into a dressing room with 10 pairs of jeans to try on, even though you just need one.

These are the spirits of innovation past: 11 products and services that Google axed. Not everything Google touches turns to gold

Want Googles money? A sweet spot for Google Ventures managing partner is where the cloud meets genome sequencing. Want Google’s money

How FamiliesGo! founder Eileen Gunn will break away from day-to-day tasks to map out a long-term strategy. Planning and structure has been on my mind lately. As a freelance writer I’m good at imposing both of these things on my work

Sure, they're fun places to work.

Start-up founder Eileen P. Gunn writes about how she budgets time to maximize focus, momentum--and rest. I wonder if Congress would consider creating a longer day, specifically for entrepreneurs

Quantum logic is quite a new and absolutely fascinating field of physics and might – ultimately – lead to the fabrication of a quantum computer. And it could also aid the search for the "theory of everything" – the missing link between traditional physics and quantum physics. One of the fundamental questions hereby is whether fundamental constants possibly vary.

Entrepreneur Andy Crestodina explains how he uses Crazy Egg to analyze web traffic. My partners and I run a Web design and video production firm, so it's essential for us to know how visitors are using our clients' websites. Earlier this year, our SEO partner recommended an analytics tool called Crazy Egg, and now we're huge fans.

During a recent business trip, Tech Trends columnist John Brandon tried out LiquidSpace, a website and app designed to help you find a temporary workspace. I travel frequently for story assignments