As 3pointd posts here there is a 72 build-a-thon in New York City and Second Life happening at the moment. It started this morning and thus is still on-going. SL Builder Versu Richelieu will spend these 72 hours in a store window in New York City while she is building inside Second Life. See the live streams from NYC and SL here.
This event is a marketing effort of Intel for their Centrino Duo-based laptop line and was brought in-world by MillionsOfUs.
See some pictures of the SL place as it is right now. If you want to join the crowd to party in front if the camera in Second Life, IM Rodica MillionsOfUs and she might add you to the group.