It looks like in the recent upgrade, it got stomped. Though already talking with Alban to get it back on the site here early next week!
Any chance of including p3d.in as an alternative? I personally prefer it’s ease of use and it has great texture tools (http://www.youtube.com/watch?v=v8hAoadT7K4)
… and they use this on blendswap.com as well 
@comeinandburn - yup P3D is integrated, though just need to click on the advanced reply. Need to move those guys up to quick reply as well!
…oops, that’s embarrassing:o
[p3d]MJCQ6[/p3d]
I seem to be having some difficulty…no matter what I do, the textures on my model will not show up when I upload to Sketchfab. I have the textures packed into the .blend, and it is using Blender internal renderer. What am I doing wrong?