From Matt Maiocco's blog:

There's talk that the 49ers and Dolphins have made contact. The Dolphins own the No. 9 pick, where Levi Brown would be the presumed selection. There was a report out of Houston that the Broncos want to move up to take the Texans' spot at No. 10 to undercut the 49ers from taking Patrick Willis.

There is also the possibility the 49ers and Broncos have discussed a trade scenario. The Broncos own the No. 21 selection, and would have to part with their second-round pick, as well as one of their third-round choices. The 49ers and Broncos made a deal last year, in which the 49ers emerged with the first-round selection they used to select Manny Lawson at No. 22.

http://49ers.pressdemocrat.com/default.asp?item=580702