search google for perapera kun. It's based off rikaichan, but with some modifications. For one, it has a export word function, so you hover over a word, and press control. the word, with reading and translation, gets added to a textfile in either tab delimited format or edict format. After reading an article, and adding words, just use the import function in stackz to grab the content. Works flawlessly. Only thing is, perapera-kun doesnt manage the entries in the export file at all, so you end up getting a huge list. What I do, is I open the file in notepad, and delete all the content inside after exporting to stackz. That way, I get a fresh start when reading the next article.