Ron, I have to agree with your comment regarding "gone missing," probably a case where the slang spread from the vernacular to national/international usage. Along that line, I hate to hear young people use the word "like" instead of "said."
"So, I'm like, what the ____ ?"
"And, he's like, "Dude, you aren't paying attention."
"And I'm like, "chill out!"
When I was a teenager in the mid-1970s, we said, "go" instead of "said," so I really shouldn't be critical. Fortunately, that fad seems to be confined to my generation.
The problem I see with "Uptalk" is that it's usage has spread beyond a specific generation, or geographical area. This realization hit me in the face during a recent visit to Minnesota. Normally, the first thing I notice is the very distinct regional dialect, or "Minnesota accent," --
http://www.youtube.com/watch?v=yByv7a2KyyU -- On this last trip, I heard that "accent" combined with Uptalk, which I initially thought might be unique to the area I now live in (San Francisco Bay).
What was really bothersome was the fact that a few members of my own family were speaking in Uptalk! Now, normally, I don't glom onto conspiracy theories, and am not inherently paranoid, but the first thing I thought about was "Invasion of the Body Snatchers." (What or whom is taking over the minds of these people, making them sound like this!)
JDS