I’m not sure what kind of products your friends want to buy for your baby. The clothing selection is not very good in Taiwan, if you want quality onesies, pants, sweaters, little hats etc for your little one. Your friends and relatives could help you prepare things like that by buying them in the US, and they are cheap to ship over. And if you are having the baby in the winter here, you need lots of clothes as they take a long time to dry. CDs and books are also good gift choices to send from overseas, as the selection is much greater and you will get some lasting things for your little one.
As for bilingual baby product sites, there is mine, but my new site is still not ready. The current one has only a limited range of products I will offer on it (baby diapers, blankets, bibs, etc at the moment, later organic baby care products, nursing teas, etc). I won’t have any large furniture or toys in my store, though. I accept paypal payments. http://www.littlewonders.com.tw
The other option is to set up a registry with a US work-at-home-mom store. Many offer a good selection and will do things like gather all the gifts and ship them over at one time for you. I know a couple that will ship over here. If you need any help, feel free to PM me.