Autopostr.com let your twitterfriends automatically know you posted a new photo on flickr, by just by adding a # to your photo title!

If you use Twitter & Flickr now you can show people where you are, not just tell them. To set this up, just enter your Twitter username and password, and your Flickr username. We will retain all this information, but will only use it to post links to your pictures to your Twitter account. You can disable this service at any time using the checkbox.