Shares of Research In Motion stock are popping for the second day in a row on rumors that the company may be looking for a buyer. RIM’s stock was up as much as 14% on Wednesday morning as mysteriously sourced rumors suggested U.K. carrier Vodafone is considering an acquisition. Investors see RIM quickly running out of cash — the vendor burned through more than half of its $2.9 billion in cash during the second fiscal quarter alone — and analysts still aren’t convinced management can right the ship. Some still see promise in RIM’s upcoming QNX lineup however, and the company could certainly hold tremendous value for a potential buyer. Market rumors last week suggested that RIM was pulling the plug on the BlackBerry PlayBook and its tablet efforts in general, but RIM broke character and quickly put the rumors to bed. With the company’s stock on the rise, we doubt RIM will dispel this new round of rumors even if they prove to be inaccurate.