David Poythress has announced that he will seek the nomination of the Democratic Party for Governor here in Georgia 2010:

David Poythress said Tuesday he believes he can pull support from moderate Republicans and independents in GOP-leaning Georgia. Poythress is a former state labor commissioner and Georgia secretary of state. He was first appointed adjutant general of the Georgia guard by Democrat Roy Barnes. Republican Gov. Sonny Perdue reappointed him and made him the first three-star general in the Georgia guard’s history.

The only other Democrat that I've heard is interested is DuBose Porter.