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how do you do that?
One way, for example: http://flickrstream.webzardry.com/ The key is "upload date" which is editable, and determines the order. If you don't have a tool for it, go to your set in the organizer, sort the set as you want, go to the first photo, open the edit modal dialog, and start stepping through the photos setting the upload time to 1 second after the last. When you're done, the photo stream itself will reflect the c…
wow, that's awesome. I hadn't realized they had made upload date writable! This has some interesting possibilities. It is somewhat too bad that changing it will wipe out the original photo upload date, though - for photos which don't have the date taken in the exif, there will be no time history of the photo left.