At the Enquirer's Politics blog, Jessica Brown lists those who have picked up petitions for the two Hamilton County Commission seats up for grabs in 2008. Todd Portune and Pat DeWine have, of course, picked up petitions in efforts to retain their own seats. For the Republicans, Jim Weidman, Charles Winburn, and Ed Rothenberg picked up petitions; attorney Tim Deardorff picked them up for someone else (no word on who). Vlasta Molak picked up petitions as well; I don't know her party affiliation, though.
On Sunday, activist and blogger Nate Livingston announced that he's considering throwing his hat in the ring, but hasn't decided whether to do so as a Republican or an independent.
Picking up petitions is just a necessary first step to running. Completed petitions to be included on the March 4 primary ballot aren't due until January 4.