Focus Foundation this is a great site for educating yourself as to what it can mean to be XXY, we are definitely not all the same.
You want to find the latest, (or any) information about Sex Chromosome aneuploidy, go to PubMed
NZ DSC Twitter
Australian AXYS
UK KSA
Living With XXY
NZXXY’ers
AXYS USA
Patient (formerly Patient UK) Discussion – What does it feel like to have Klinefelters Syndrome?