I can confirm from the earlier part of the thread that TurboSketch Studio was discontinued about 2 years ago. We replaced it with the IDX-Renditioner line which included a free version and a full version. The free version supports a maximum render of 640x480 pixels and is single-threading. The full version provides larger renders, up to 16 megapixel images, and full multi-threading (fun on an 8-core Mac Pro).
IDX Renditioner provides a lot of quality improvments, better integration with SketchUp, and supports SketchUp v6 and v7 (TSS was v6 only).
On the old site www.turbosketch.net
, if you log in and go to the Support tab you are eligible for a free update to an intermediate version of IDX Renditioner that provides 1024 x 768 renders, single threaded. That free update may not be supported for too much longer. It checks that you have or had TurboSketch on the system in order to install... If you have any questions on it the best place to ask would be http://forums.idx-design.com