Twitterers Worldwide Gather for Twestival

Ms. Rose said that the Twitter community is particularly adept at mobilizing Internet activity into real-world action because the undercurrent of social currency is strong within the service’s ever-expanding community.

“You have a bit more of an audience when you Twitter something,” she said. If you do participate in Twestival — whether to donate using TipJoy, volunteer time or contribute ideas, “it doesn’t go unnoticed.”