'Tell me abouts' only require a keyword. Each could be rephrased into a question that shows up in normal dialogue. Obviously only those that result from keywords the player character would know about should show up. For instance, going to Junktown or hearing about it. Why, you may ask: because there's a tonne of great dialogue that's rather tedious to experience, but it doesn't have to be that way. I also feel that the 'Tell me about' approach takes me a bit out of the experience. Whereas having them show up in normal dialogue would put it more in line with roleplaying.