I just recently found that I am IS. How it has taken this long to find this out is beyond me... Whatever though. And, this is long after knowing that i'm TG. What does this mean? Like Keaira said, not much. The only major difference is that it makes things far more complicated. I've just tried to explain it to my parents, and they're completely lost.
@ Zenda, people have heard of transsexual before... most people, including doctors, have no idea what involves being intersexed. So, I doubt it.
I can see where you are coming from though, OP. I think IS and TG in many occasions go hand-in-hand, but I'm not so sure it should be added to the IS category.