Flickr Id has immense use in web apps. If one needs to have a gallery that has to be displayed on the website, embedding Flickr slide using Flickr Id is the easiest way . Use idGettr - Find your Flickr ID  to  find your Flickr user or group id.  I am developing a website for an NGO in Bangalore. Displaying their past events using flickr was immensely useful to me. No longer one needs to copy all the images in public/images folder and create gallery layouts in your webpages..Thanks Flickr!

Here’s the code for embedding a slide show
http://www.flickr.com/slideShow/index.gne?br%20/user_id=12345678@N00&tags=YOUR_TAGS