my Dh gets alot of the same symptoms as i do, he doesnt neccasarily spew though just feels sick around the same time as i did.. this has been the case with both my pregnancys.
i fiqured he used to just tell me he had the same symptoms for some sympthy but on numerous occasions i would mention to someone other then DH that i had sore back or felt sick. he would walk in from outside and say the same thing.

just recently he was overseas for work and without telling him that my carpel tunnel had been getting worse, he comes home and tells me that while hes been away his hands are really sore and he would wake up at night numb with pins and needles.......just like i had been,
it seems strange but i have to many occasions where he is experiencing the same thing as me with out tellling him.

so yes i believe they can experience our symptoms.