I've read many posts with something along the lines of "gifts aren't expected," "a shower is a celebration of new life," yada, yada, yada. . .
I peeked in my handy Webster's dictionary and shower is defined as "4. a party for the giving of gifts, as to a bride." It just isn't logical to me to have a "shower" but not expect gifts.

If you really don't expect gifts, and your true intent is to celebrate the new life then call it a "Birth Celebration Party" or something else along those lines. BTW, I buy gifts for 2nd and consecutive children thereafter. I just don't patronize the "shower."
I became fed up with the abuse of
showersand such a few years ago when I was invited to a "housewarming" for an unmarried couple who got an apartment together. I have gotten invitations to showers for 2nd, 3rd, 4th babies from people who work in the same hospital as me that I don't even know. These people wouldn't know me if I jumped up in their face and said, "Boo!" I've received invitations to showers for 1st babies of people I don't even remember (my mom or sister will remind me of who they are). I get confused as to how they even got my address!
Registries are another annoyance with me. I've seen the pregnant women mowing people down to zap every bar code in sight with that stupid registry gun at Babies R Us and Target. Lydia's occupational therapist mentioned to me several times (she got married a few months ago) all the many places she was registered at for her wedding gifts. Is that really appropriate to be squeezing your patient's parents for wedding gifts? (BTW, we weren't invited to any of the 4 showers or the wedding.) It has all just gotten out of hand. Unfortunately, I've had to adopt a zero tolerance policy for abuses. I give gifts to very close friends, close co-workers of mine and dh's, and family no more distant than 3rd cousin. If I'm invited to a housewarming for a new home, I attend and take a gift. If I'm invited to a wedding, I do my best to attend and take a gift.
Now that all the above is off my chest, I have this to say. For a 2nd and consecutive children, a diapering shower is appropropriate. A pack of diapers can be purchased rather inexpensively. When my closest friend has her 2nd baby I plan to give a Diapering shower. She is a wise person and has saved all of her 1st sons things.
Added: Is is getting to be graduation season? How do you like getting graduation "invitations" from Great Aunt Thelma's 4th removed cousin's grandson? When we get those it feels like we just got the electric bill in the mail.