3d Photorealistic Rendering - Provides resources for Softimage XSI and 3D users, including videos, classes, tutorials, utilities, plugins, scripts, shaders, and models.
Highend3d.com - A high end 3D resource and community web site for Alias PowerAnimator, Maya, Softimage, Sumatra, and Renderman users.
Softimage Surface Continuity Manager Tutorials - Five tutorials by Jeremy Birn that cover a multi-patch approach to NURBS modeling, which allows NURBS to be assembled into a seamless "quilt" of multiple NURBS surfaces, which together define a complex organic form.
Softimage User's Site and Mailing-List Archive - Providing resources for Softimage users, including learning resources, tutorials, a knowledge base index and the mailing-list archive, the Archive archives all 9 of the SI-related mailing lists in a web browsable and searchable format.