I may be missing something here, but are you implying you actually compose your entire article in the submission form? Call me crazy, but I had generally assumed the forms were for actually pasting the completed text of your work in, and the "preview" function was a final check to make sure everything is properly formatted and edited before committing to it.
As for "save story," I don't know about your computer, but mine has some wonderful things on it; mainly a text editor (UltraEdit32) and a hard drive, both which allow me not only to write articles (or anything I feel like!) but which also offer the ability to save that particular piece of writing before it is completed. And none of this with any added burden to the k5 server(s). (Which we all know haven't been particularly speedy lately.)
If you want, you can even convert your text file into HTML, save it as a .html, and load the page in Netscape!
Just a thought.
This post was probably not written by the real Jin Wicked. Please see user "butter pie" for Jin's actual posts.