I just made this example for a screenshot in the book, but it demonstrates how to use the username block in Scratch 2.0 to provide a personalised greeting to the player, and also how to combine the username variable with some words in a single speech bubble.
This is an example from the book Scratch Programming in Easy Steps by Sean McManus. More info here: http://www.sean.co.uk/books/scratch-programming-in-easy-steps/index.shtm
