I went and registered at Babies R Us for a few things with my mom REALLY early in the pregnancy (Mom is into retail therapy
); mostly just clothes and a pack&play for camping, car seat, etc. There was so much at Babies R Us that I am not planning on using
(bottles and strollers and nursery furniture and bouncy seats), and a lot of the stuff that I AM planning on using (sling, "family bed" pad, etc.) that isn't available at Babies R Us.
Luckily I stumbled across Felicite.com, which has a merchant directory FULL of cool stuff and an online registry that is simple to use. People can also do partial-purchases at Felicite, so that things like the family bed pad (which runs $200) can be "chipped away at" by friends, coworkers, etc.
I figure when shower plans start gearing up, I can just give both websites to whoever is handling invitations, and we will be covered: people who really like to shop can go to Babies R Us, and people who would prefer to order online can check out Felicite.
Good luck to you--registering is tons of fun!