A Flickr WordPress plugin to display your photos either as a gallery, a galleria or a unbranded slideshow in posts, pages, and sidebar widgets.
The Flickr show is inserted into a post or a widget using the slickr-flickr short code.
For example, to show my pictures from Flickr that have been tagged with "bahamas" I use : [slickr-flickr tag="bahamas"]
For the full list of Slickr Flickr parameters go to http://www.slickrflickr.com/56/how-to-use-slickr-flickr-to-create-a-slideshow-or-gallery/
If you don't want to specify all the settings for every Flickr slideshow or gallery you can set up some defaults. The default value is used when you have not specified a value on the individual slideshow, gallery or galleria. All the following settings are optional; we only strongly recommend you set the Flickr ID to save having to set it on every use of the plugin.
For more information on the other defaults you can set up, go to http://www.slickrflickr.com/40/how-to-use-slickr-flickr-admin-settings/
Here are some of the useful Slickr Flickr WordPress Plugin links