From the site:

I had some free time at last, so I implemented a LINQ extension to Flickr, so you can query for photos by tags, creation date, user id or title, the implementation was really easy because I didn't have to use the Flickr API's directly as I found a good open source library for this called FlickrNet which I used as my infrastructure.

http://spellcoder.com/blogs/bashmohandes/archive/2007/04/08/6552.aspx