Yahoo has updated their translation site – babelfish.yahoo.com. If you need webpages or snippets of text translated, such as historical documents or newspaper articles, you can paste them in (either the URL or the 150 words of text) and it’ll spit out the translated text.
Very handy when working with international records.
Update: From a genealogical perspective, Yahoo inherited Babel Fish from Overture, who bought it with AltaVista. This is the actual, official launch under the Yahoo brand.