It seems as though Apple read my mind and tailor-fitted Safari v125 just for me. The Downloads window has received a huge boost with the latest Safari release. As mentioned in previous hints, you can now (1) Control-Click on an item to bring up a contextual menu (there's still no way to reload successful (or even failed) downloads AFAIK, but a definite improvement), and (2) option-click on the 'time remaining' label to change the text to the download speed.
But my favorite change is that you can now drag-and-drop onto the Downloads window! Links, files, even your location bar are applicable candidates.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040206200832278