Labor - A mechanical grape harvester could be the answer to a shortage of farmworkers in Oregon's vineyards Surrounded by shiny new tractors, Carl Capps spends most days talking about horsepower, hydraulics and transmissions. He paid little attention to anti- and pro-immigrant-legalization activists who marched at the state Capitol. Then the immigration debate came to him last fall, after he sold a quarter-million-dollar machine that harvests wine grapes -- the first in the Willamette Valley. The New Holland Braud grape harvester can do the work of 40 handpickers in a fraction of the time. Suddenly, vineyard owners were calling Capps...