If you're a performer, have you ever busked (including at an SF con, Ren Faire, or similar event)? How did it work out? Do you enjoy it? Do the passersby seem to enjoy it? Have you ever had a really negative response?
As a passerby, how do you feel about buskers? Do you ever put money in the hat? What impels you to do so or not do so? If you are yourself a performer, how do you feel about other buskers? Does "knowing what it's like" make you more or less likely to put in some money?
And to all, do your feelings about buskers carry over to technology-mediated, crowd-funded projects, such as Shadow Unit or Tales of MU? Does it make a difference if the author / artist just has a general "donations welcome" button on the site vs. "this content is available to donors only"? What similarities and differences do you see between traditional busking and crowd-funding via the Internet?
Other comments? My own thoughts in the comments.