I too am interested in whether this is likely. My OH and I are expecting our little man in March, and there's always the chance that he may have Asperger syndrome.
My OH has a mild form of Aspergers, causes him to be quite anxious, and sometimes quite silly, but it really isn't too prominent. OH's youngest sister also has Aspergers, but more of a serious case - very interesting, so if it is genetic then it would mean that OH's mum carries the gene. Unsure who this may have been passed down from to her, but I have queried OH on his grandfather and he's told me he was quite eccentric - you never know
Only time will tell! Should be noticeable when he's a toddler, I've heard. If I remember I'll be sure to get back to you (though it may be in awhile so I can't guarantee anything

) x