I've been using this plugin today and it really is fantastic
One problem I've noticed is that the textures (regardless of source image size) massively increase the file size. This means that the high poly chair I've been working on has increased from 4.75MB to 10.5MB, which means that I can't share the model via the 3D Warehouse.
Is this because the OBJ file is bundled with the SU file, or is something else going on? Is there any way to get the file size back down again?