One troubling bit of rhetoric on the left is to make a big deal about having a picture ID in order to vote; VP Biden was playing that card in his NAACP speech this week. In their eyes, having to get the ID is tantamount to a poll tax and hits poor and minorities hardest.
Given all the things that require ID, I would think that voting would be the least of a non-IDed person's worries. Banks will want some ID from you in order to set up an account and doctor's offices generally will ask for ID as well. Getting some medicines will require ID if they are abuse-prone; even getting Sudafed will need ID to avoid the meth-makers from getting ahold of it. A friggin' library card will need ID in most places.
If all those things hasn't gotten you into the Secretary of State's office yet, you have problems beyond voting and need to be ministered to. Some the GOTV money that goes into voter registration drives might be better spent (at least on a humanitarian level) getting folks a state ID card, which, thanks to the motor-votor law, will get you registered to vote as well if you're a citizen and over 18.