Picturegrid shows photos from a specific set from your flickr account (or just recent photos) in your wordpress blog, with or without a lightbox.
The Picturegrid wordpress plugin allows you to import your Flickr images into your sidebar, or onto any page. In fact you only need to call the function
<?php picturegrid(); ?> inside any page template to show the grid using the settings set on the options page inside the wordpress dashboard.
Picturegrid is also widget ready! If your theme supports widgets, just go to the widget admin panel and drag the picturgrid widget where you want it. The Picturegrid widget makes use of the default options!
See the Plugin Project Page for more information and an update list and too see examples and screenshots.