Someone mentioned tasting baby food to guess what it is, but I think that's kinda gross. I'm not about to taste that stuff! I've played it where you pass around the jar after the labels have been taken off, and you have to guess what kind of baby food is in the jar. That's fun, and I was good at it. :) Also, the don't say the word "baby" game is a lot of fun, and you play it through out the shower. It's best to be played with the plastic binky on a string worn around the neck. That way it's easy to see it to take it away. The pins are hard to spot because they can be hidden.
A couple of things that were different at the last shower I went to was that everyone was asked to bring diapers, and if you did your name went into a drawing for a special gift. This particular shower had a huge gift for that, but I think it could be small, and still be nice. And the other thing was while mom to be was opening gifts a timer was set. Each time it went off the person who's gift it was got a prize herself. That was an interesting "game". I had never heard of that being done before. Also there was a stage 3 baby food jar filled with safety pins and everyone wrote down their guess, and the one closest to the right number got a prize. Another game I have seen and loved is having several baby items layed out on a tray, but put together in a way so that it might not be so easy to see them all. The guests are given about 30 seconds to look at the items. Then it's taken away, and they write down what they can remember. The one with the most gets a prize, and at the end of the shower mom to be gets the tray with the items. You would put small things on it like a couple of safty pins instead of the whole package, and a couple of q-tips, not the pack. Hard to spot them, but someone always does! This could also be done with a diaper bag. You can pass the bag around so everyone sees what's in it, or have someone take out each item, announce it, and then put them all back in to see who remembers. You have about 1 minute to write all your answers.
This should be fun planning it all! Good luck!!