I've always wished Second Life
would render in stereo, that would be awesome. HMD head-tracking would be the icing on the cake.
Here's the (sort-of) feature request that has been hanging around for three years:http://jira.secondlife.com/browse/VWR-2972
Although there used to be an anaglyph version of SL available, it became out-of-date and therefore incompatible with the servers.
Vuzix also released a version that worked with the VR920, but it was no good at all.
It looks like people have managed to get SL working (to some extent) with stereo drivers though:viewtopic.php?f=2&t=487&p=1767&hilit=second+life#p1767