Rural Marin has a dearth of high-speed Internet access, posing particular obstacles for people living on agricultural lands. But the county may soon acquire funds to help remedy that problem: next week the Board of Supervisors will vote on whether or not to join a coalition of counties applying for a grant that could help expand high-speed Internet. “Marin, of the nine Bay Area counties, has the highest percentage of people unserved. Guess where they…