I did a gallery search here on the regular cricut and there are alot of pictures that are awesome. The Cricut Cake will allow you to cut thicker gum paste/cookie dough. I just seen a thread that Big Lots is selling the Cricut for $129. and Carts for $30, not sure which Cricut tho. HTHhttp://www.cakecentral.com/cake-decorating-ftopict-677896-cricut.html
If you didn't want to use carts and wanted to use your own designs, there's 3rd party software that will allow you to be creative. Sure Cuts Alot (SCAL), also a new software called MAKE THE CUT (MTC). FYI: Provo Craft just filed a lawsuit against MTC. MTC has many more features than SCAL. MTC, he is a software developer with a forty hour work week, he developed this software because his wife has a cricut and their software is very limited.
forums to view and download templates,http://forums.surecutsalot.com/viewforum.php?f=13&sid=5e2a9284f7b8c74ceb2b16717865e059http://www.make-the-cut.com/forum/?ref=rn_header
You can download both software for trial purposes.
You also can download a free program called Inkscape and use their SVG files to use as templates. There are many free SVG files out there, just google SVG files.http://www.inkscape.org/download/