You are getting a lot of really great, constructive ideas.
I would caution not to try to do too many different appys, but to do TONS of the ones you choose.
An attractive presentation (basket or otherwise) of crudite with three simple (but varied) dips is always a hit as a stationary hd. It's also a good idea to have a bunch of stationary, cold hds that folks can come help themselves to. If you are having hot hds, passing them is the best way to get them out fresh. How about enlisting the high school class of your local Sunday School to help with that?
Keep those hot apps simple and easy and hopefully mostly do-ahead/heat on site (like Spinach Balls with Mustard Sauce and Ham Balls with pineapple salsa)
FWIW, I don't recommend serving shrimp unless you have an unlimited budget. that can get almost as costly as an open bar. Plus, we all know those three or four folks who will stand at the shrimp platter and stuff themselves until there are no more for anyone else... Save the shrimp for a different occasion.
If you'd like the recipes, just ask.