We had naming ceremonies for the DD's. When people asked what we wanted as a present we said nothing just for them to celebrate, with us, welcoming our DD's into our families/communities etc. Yes it was a fab reason to have a party, as is a christening, NO it was not a reason to get presents from family and friends or about showing off.
Both DH and myself and our respective families and all of our friends enjoyed both of the DD's naming ceremonies.
Just because DH and I are not at all religious why should our DD's not have a big get together to welcome our the, in to the community and into our families.
Incidentally both DH & I have a lot of family and friends who live away or abroad and they were not able to get home to see the DD's when they were first born (as the family and friends who lived local could and did) so DH and I spoke to all of the people who were not local to find a date suitable for them to be able to attend. It was fab to see so many family and friends that we would only usually see very occasionally. Also we did not expect them to attend at all, they wanted to.