Word on the Street is that Yahoo! Inc (NASDAQ: YHOO) CEO Terry Semel is considering resigning from the Internet giant. Rumors are swirling that if Semel resigns, potentially within the next six months, co-founder Jerry Yang will take his place as CEO and Sue Decker will become the company's president.

Last week, the Associated Press reported that angry shareholders have been looking to oust Semel for some time. One shareholder, the article noted, said he believes the company "is drifting" and "its problems ultimately lie at Terry's feet. The feeling among shareholders is widespread." The fact that rival Google Inc (NASDAQ: GOOG) has seen its shares increase nearly six-fold since going public, while Yahoo!'s stock fell 4%, has had shareholders calling for Semel's head on a plate; Google's stock has risen about 30% over the past year, while Yahoo!'s is down 10%.

Shareholders believe that Yahoo!'s younger rival is dominant in the search advertising field, partly because of its acquisitions of DoubleClick and YouTube, while Yahoo! is contending with the resignation of CTO Farzad Nazem (Jerry Yang is serving as the company's interim CTO).

Then there's the issue of Panama, which some claim to be a "Google-wannabe." Back in January, the Wall Street Journal reported some users saying that an upgrade to the online-ad system is a "hassle." Currently, Yahoo! trails behind both Google and Microsoft Corporation (NASDAQ: MSFT) in the ad-search field, and with many disappointed in Panama, investors can only hope that a new CEO, someone with "fresh eyes," would be able to make an acquisition -- online advertising company ValueClick Inc (NASDAQ: VCLK), perhaps? -- to fill in the gap.

Let's say Semel resigned and Yang took his place. Many analysts feel that this would be a positive move for the company; RBC Capital, for one, believes that shares of Yahoo! could go up $1-$2 should Semel resign. Under new management, the firm said, the company could be open to new ideas that Semel had previously rejected.

While there has been speculation the company would be put up for sale under the direction of Semel, perhaps an intense restructuring under a new leader would be what the company needs to get back on track.