Something not affected by the poisons in nightshade family plants. What, exactly does the nibbling look like? What kinds of patterns do the eaten out portions make? This can indicate who is at work.

Not sure how to discribe. It basiclly looks like someone snipped all my skinny lower branches, and then starting chewing on the main stem and quit before he got too far to kill the plant. Its about a 3/4"x 1/2" chomp he took out.

What ever this is just make a meal of my Roma tomatoes last night. Help!

Go out at night and look for it/them.

Are you sure it's not a tomato (aka tobacco) hornworm? Just one of those suckers can tear a tomato plant up, even eat through the stem in rare cases. Look at the plant closely, under the leaves, between the stems, etc. They can hide pretty well because they are about the same color as a tomato leaf. If it is a hornworm, he'll probably be back to tear the plant up some more.

Hornworms can do an unbelievable amount of damage, and eat a huge amount of foliage. Don't believe me? Read this thread:

http://forums.gardenweb.com/forums/load/tomato/msg051651071204.html

This doesnt look like a worm issue. What ever it is, its short. All the nibbing is very low on the plants.

Take some leaves to a reputable nursery or master gardener clinic in your area. There's no substitute for in-person diagnosis.