IBM is making a virtual world for design research for Fashion Research Institute (FRI) using a combo of Second Life and OpenSim:

This first-of-a-kind system will allow fashion and consumer packaging designers to access and use 3-D tools with the Second Life client interface. In addition it will also connect to the OpenSim virtual world platform to create packaging and fashion products, provide efficient workflow queues, and allow groups with an interest in the product to collaborate and modify designs.

Those 37 avatars that voted 'Something about inter-grid travel' are right in the end, as today Linden Lab - not Mr. Kapur - announced the first intergrid teleport to be succeeded. This is a memorable day for virtual worlds interoperability.