I'm hoping someone will throw me a shower, but nothing planned as of yet. I recently attended a shower for a friend and the host provided loads of plain onesies, fabric paints, decals, etc. Everyone decorated the the onesies. Most were very funny, some had personal messages, all were cute and it provided loads of entertainment. Even the men who showed up at the end stayed and decorated a few. I don't know how many the mom actually ended up using, but we all had fa great time.
Another friend had a diaper raffle. The had a mani/pedi certificate and a bottle of booze and everyone who brought a package of diapers was entered in the raffle. I didn't make it to that shower, but I know she got a lot of diapers.