I could use some more ideas....Please! And thanks!
Just curious why you promised free stuff? The only thing that comes to my mind would be rice socks. I used to make a rice bag for every doula client I had. I went to the dollar store and bought a package of 2-3 washclothes for $1 and then bought a bag of rice and sewed them up. My clients loved them. Although now in my area several of the hospitals won't allow them in.
Traditional Medicinals offers pregnancy teas and lactation ones at a decent price, it's available in grocery stores and I've heard of them sending samples for birth educators to give out.
Other ideas: Massage tools, Preggie Pops (anti nausea naturally flavored lollies, they might send samples too), baby socks and hats, reusable water bottles,
Jewelry: necklace cord with a charm like this http://www.firemountaingems.com/details.asp?PN=H207075FN or http://www.firemountaingems.com/details.asp?PN=H203181FX or something spelled in beads on a bracelet, if you want to bend wire yourself something like these http://www.labelledame.com/pregnancy-jewelry.html
Edit,that pewter one might have 1.5% lead though so something similar in another metal would be ideal.