Personally, that was the first I ever heard of him. Given my age and his complete irrelevance to anything I cared about (basically just computers and cartoons) at the time, I had no reason to.
Honestly I still don't know much about him, mostly because I don't care. But everyone loves an epic fail story.
Yeah I felt the same about them as I did him and Miles. I could be forgetting something, but I just didn't get (or remember, is been about 12 years since I watched it) the sensation he wanted to bang anyone except Jadzia. Even Ezri he just wanted to be best friends with.