I have eaten lunch meat a few times throughout my pregnancy, but the risk isn't decreased just because you are further along. You may be less likely to miscarry, but there are still dire consequences to your baby if you manage to contract listeria:
"During the first trimester of pregnancy, listeriosis may cause miscarriage. As the pregnancy progresses to third trimester, the mother is more at risk. Listeriosis can also lead to premature labor, the delivery of a low-birth-weight infant, or infant death. Fetuses who suffer a late infection may develop a wide range of health problems, including mental retardation, paralysis, seizures, blindness, or impairments of the brain, heart, or kidney. In newborns, L. monocytogenes can cause blood infections and meningitis."
You have to decide if eating lunch meat, or other "risky" foods, is something you're willing to do or not. The risk is incredibly small, but don't think that just because you are further along the risk is reduced. That's not the case at all.
(Info from: http://www.fda.gov/food/resourcesforyou/healtheducators/ucm083320.htm)