Zynga edges away from Facebook; Yelp prices IPO at $15

Business news from around the Web:

• Creditors seek to block Grubb & Ellis bankruptcy sale (Portfolio)

• Yelp raised $107 million as it priced its IPO at a better-than-expected $15 (NYT)

• Zynga launches its own site, seeking to build identity away from Facebook (WSJ)

• London’s Liberty department store considering mall shops (Bloomberg)

• Oil leaps to highest level since 2008 on rumors of Saudi blast (FT)