Trulia Inc. is providing "premium placement" of all listings represented by San Francisco-based Alain Pinel Realtors under the terms of a "strategic partnership," the companies announced today.With 1,400 agents working out of 32 offices in the San Francisco Bay Area, Alain Pinel was ranked by Real Trends as the sixth-largest U.S. real estate brokerage by dollar volume of transactions handled in 2010.Premium listings show up on top of search results on Trulia.com with a brokerage's branding. Trulia claims a branded homebuyer request form that appears next to the premium listings generates three times more leads than are generated by the company's nonbranded form.If agents have not "claimed" them, listings on Trulia are often accompanied by "Trulia Pro"...