I haven't seen conversation lollies in the shops for years. Maybe I'm just not looking hard enough.
Mary, I wonder if they've become less universal (not sure). They're made by the Necco company, which is still in business and still soliciting new sayings for its less traditional boxes of hearts (they still sell Sweethearts with the tried and true sayings). Here's an article on what they're doing now (but you might have to cut and paste, since the comments section won't let me add links): http://www.wgbh.org/articles/A-Candy-Company-Tries-Again-5555 (also, if you click through to the link at the end of the article, there are some interesting images).