Yes, I was adopted, as well as the majority of my half-siblings. I found my birth family in 2000, and subsequently found out I was the oldest of 8 (known) children of my birth mother - none of whom she managed to raise herself. Over the next couple of years I found all of my half brothers, but am still searching for my only half-sister. My birth mother passed away early in the year 2000, before I found one of my uncles. All of my half-brothers are alive so I cannot give you details on them. I'm still trying to pin down who my biological father is, so it is possible he is still alive.
There have been a few distant cousins as well, who were adopted, and a few people further back in my tree who adopted their sibling's or friend's children after the children's parents perished or disappeared.