The one that was given for us, we played "Baby" Win, Lose or Draw, and name that nursery rhyme. The W,L, or D we drew cards and had to draw diapers, bottles, bibs, pacifiers and any baby stuff. FOr the nursery rhymes there were phrases from different ones and we had to write down which one it went to.
For ones I have done for friends, I bought about 12 pairs of socks (all different) put them in a basket and guests had 10 or 15 seconds to see how many pairs they could match. The mom-to-be got to keep all the socks for the baby as a gift from the hosts.
Or, you could do the good-ol-fashioned guess that baby food. Peel the labels off, number the bottom of the jars 1 thru whatever, pass the plate around and the guests have to figure out what kind is in each jar. They can smell, taste or just look. They have got some goods ones now that are harder to guess.
Also, Party City has a book that has a bunch of games where you can get the book and make copies out of the book for whatever games you pick.
Hope this helps...Good Luck!