According to Wikipedia (the incredibly credible source):
A push present (also known as a "push gift" or "baby bauble") is a present a new father gives a new mother when she gives birth to their child. In practice the present may be given before or after the birth, or even in the delivery room. The giving of push presents has supposedly grown in the United States in recent years. The tradition of gift-giving to commemorate a birth has long roots in England and India. The term "push present" first appeared in a publication in 1992. There is, however, no conclusive evidence that the present was invented by the jewelry industry to sell more goods, and until recently it was passed on largely by word of mouth or peer pressure among both mothers and fathers. According to Linda Murray, the executive editor of BabyCenter.com, "It’s more and more an expectation of moms these days that they deserve something for bearing the burden for nine months, getting sick, ruining their body. The guilt really gets piled on." Other sources trace the development of the present to the increased assertiveness of women, allowing them to ask for a present more directly, or the increased involvement of the men in pregnancy, making them more informed of the pain and difficulties of pregnancy and labor.
I never heard of a push present until a few months into my pregnancy, but I have pretty much known what I wanted since then. Well, I originally wanted the Al Merrick Flyer II, a board I had back in high school that is pretty much unrideable now, but the new models are only available as a custom design, so I think I'll stick with the Al Merrick Flyer I. Unfortunately, we don't know exactly where we'll be stationed come July so I told the hubbs he should wait on buying it for me. I'd much rather take a raincheck on a brand new surfboard than settle for a piece of jewelry. (Nothing against jewelry, though... I like that too.) :)