i cant seem to figure it out.. any idea? thanks in advance.
No I dont think so, apart from spidering which is probably not allowed, so in a matter of fact I never said that.
GauGau put together a plugin package of all contributed plugins. He might do the same for the contributed themes, but I would think the theme contributions are more frequent and so might be less amenable to keeping a theme package up-to-date, hence it might be eschewed for practicality's sake.
I downloaded all the themes a few weeks ago using CTRL-click in a tabbed browser (Firefox) and it only took a few minutes to download them all. Sourceforge makes it a little more indirect to download files, but its advantage is that it provides a free way for open-source communities to distribute files using its many servers, so in the end, it's better, although a bit inconvenient.