My wonderful sister in love (in law) did one for me. She bought gifts according to the "9 months of pregnancy", like the 12 months of Christmas. "In the first month of pregnancy my sister gave to me...a monitor to hear the baby. In the second month of pregnancy my sister gave to me...two massage coupons for the mommy." and so on. Sometimes she combined the postage and I was made to promise not to open up the other packages til the following month. Most of it was not high-end stuff (packs of receiving blankets, onesies, etc.) It was a delight! She sent me stuff for me and the baby.
So it's not just gifts, you could ask the friends and family to write out good advise on 3X5 cards that you have hole-punched and sent to them. They can then send it to the expecting mom . Then, when she receives them, she can put them into a booklet.
Perhaps you could organize that among her friends and family. Or, maybe that's more planning than you want to do. It was an amazing experience for me to receive these things.