From the blog "Featured News"
Today we’re rolling out a new logo for Second Life.
Second Life has seen a surge of interest from people new to SL, longstanding residents, and groups and businesses seeking a uniquely interactive place for gatherings and special events. With this renewed attention we decided it was time to update a key part of how we tell the world what SL is all about. Second Life is still going strong, with a devoted and energetic resident community, and we want everyone to know that.