Some of my tomato plants are being nibbled on by flea beetles. I've been smashing them one by one when I can (they jump like fleas), but my research suggest that they like recent transplants, so as the plants grow, the bugs might just go away. They've also been restricting their diet to the lower, older leaves, which grew entirely indoors and are probably more tender than newer leaves--perhaps this is why they like recent transplants. The damage is mostly cosmetic at this point, but I'll have to keep a close eye out.
An example of some flea beetle damage.
More flea beetle damage.
Two flea beetles in action. One of them didn't live long after this shot...