My mom gave DS a sterling cup engraved with his name and birthdate, and my dad gave a coordinating silver spoon. Also, both invested money in his RESP (educational savings plan). A number of our friends also gave him gifts.
Nothing overt from any of the ILs, though DH's parents' best friends did throw a beautiful party at their home for DS after the service, so they may have been involved in that. I don't know. The friends are both elders in our church and the husband was clerk of session at the time. The whole baptism is still a HUGE sore point with DH's side of the familiy because SIL was very badly behaved about the whole thing.