A while back, Rob Linden was asking for volunteers to collect and compile periodic JIRA statistics. Jason Giglio took that idea "and kinda ran with it", producing the sljirastats website.

JIRA, the issue tracker used by Linden Lab, is more or less frequently slammed for having a daunting interface. Realistically speaking, while it could probably stand some improvement if it is intended to be used by non-technical people (whether it is or not is in some doubt), it's no worse than most and better than quite a few.

Linden Lab's Second Life viewer, is available for a variety of platforms (Windows, Mac, and Linux in varying degrees of support) - and the source code is out there. There's a Solaris version kicking around out there somewhere too.

Linuxworld takes a brief look at Second Life, and a rather longer one with the viewer, speaking to notable open-source community members as Jason Giglio and Callum Lerwick, Tofu Linden of Linden Lab.

The piece touches on licensing issues that are impeding voice support under Linux, blocking issues with closed-source video drivers (most notably with ATI, though nVidia are also implicated), OpenJPEG versus JPEG2000, codebase-forking and more.