The momentum keeps building for Uber.

Just last week, The Wall Street Journal that General Atlantic, BlackRock and Technology Crossover Ventures were considering an investment of around $500 million at a valuation north of $12 billion.

"Uber, whose mobile app connects people with drivers for hire, was valued at $3.5 billion last summer. The latest round could catapult Uber past three of the most valuable tech startups: home-rental site Airbnb Inc., file-storage service Dropbox Inc. and Chinese handset maker Xiaomi Inc., which were all valued at $10 billion apiece by investors in the past year."

Click here to read more:

http://blogs.wsj.com/digits/2014/05/25/investor-talk-on-ubers-valuation-hits-as-high-as-17-billion/