SI has a temporary community area in Second Life. You can use the SL URL link to teleport yourself to this area. You will need to download and install the Second Life client prior to clicking on the teleport link.

Second Life: Download link for the client
Teleport: SLURL to SI SL Community Area
Facebook: The SI in SL group in Facebook

Interesting things to see in SL:

• Open-Source Museum of Open-Source Art(OSMOSA)