"Twenty-seven states have broader voter identification requirements than what HAVA mandates (note, however that the newly passed requirement in Oklahoma does not take effect until July 1, 2011). In these states, all voters are asked to show identification prior to voting. Nine of these states specify that voters must show a photo ID; the other eighteen states accept additional forms of identification that do not necessarily include a photo (Table 1). In no state is a voter who cannot produce identification turned away from the polls—all states have some sort of recourse for voters without identification to cast a vote. However, in Georgia and Indiana, voters without ID vote a provisional ballot, and must return to election officials within a few days and show a photo ID in order for their ballots to be counted."
I do this having been a poll-watcher for a Tea Party group on Election Day.
The problem with a Voter ID is that it will too easily become a kind of internal passport like the Soviets used to control the Russian population.
The Liberal Superstate has already shown an appetite for pulling people's livelihood "licenses" (doctor, lawyer, etc.) when pushing beeves over e.g. child support and taxes.
If the Voter ID does in fact become an internal passport, there is no way it won't become politicized. When I was stationed in the Bahamas decades ago, the Lyndon Pindling government, which was black-racist to the core, used their work-permit system to exclude U.S. immigrants and control Canadian ones, who were required to train their Bahamian (black) replacements and then leave after a few years.
Like the Soviet internal passport, an American one could be pulled by police, crippling a person who had attracted official umbrage.
In theoretical terms, introducing a sine qua non paper document into the exercise of one's rights (suffrage, work, movement, speech, RKBA) suppresses the liberty of the person by transferring his rights to the document -- which can then be taken away by force under color of law.
I would add to that, that any person whose "rights" are subsumed in a state document knows they are counterfeit because they can be lifted by an Authority, and this knowledge must color his perception of his rights, and therefore his speech and actions.