Twitter has started to roll out advertising in an attempt to monetize the wildly popular service. John Abell, New York Bureau chief for Wired Magazine, discusses the changes.

We're hosting a tweetup! You can submit your questions about Twitter-ads and talk with other Brian Lehrer Twitter users by including the hashtage #bltweetup in your Twitter posts. We'll respond to your questions online, and use your tweets on air. Tech guru and BL Show friend Peter Rojas @peterrojas will also be riding along with us during the tweetup. You can also watch the conversation. See the posts scrolling below...