I have been using this great tool (http://sortmyphotostream.michael.tyson.id.au/) to sort my Flickr photostream by the date of the photo rather than the date uploaded. It seems to have disappeared recently. Are there other tools available that will do this?
There is an app that claims to do this (I haven't tested it myself):
Flickr photostream update - A cool app to sort your photos by taken date instead of upload date
I'd also noticed the web page was down, so left a message on Michael's blog last night and he's fixed the DNS issue that was causing his SortMyPhotostream page to be unavailable.
If you try it again now hopefully you'll have access again. See last few comments on his blog post.