From Matt Maiocco's blog:

McCloughan said he's already received some calls about spare offensive linemen after the 49ers selected Staley in the first. No names were mentioned, but obviously Justin Smiley and Kwame Harris have contracts set to expire at the end of the season.

"We've fielded some (calls)," McCloughan said. "Once we get the through this minicamp and teams see the rosters in person, we'll probably field some more. (But) we're not forcing anybody out or trying to push anybody out. We feel very comfortable with having good football players on the offensive line. You can't start dealing guys because you have five you like. You need backups as well.

"If something happens now, it's because we win the trade and we get the compensation we want. We're not going to give anybody away."

http://49ers.pressdemocrat.com/default.asp?item=587522