Not content to work merely with words, Brett has created a FlickrMate bundle that offers an impressive suite of options for interacting with Flickr and embedding images in any HTML or Markdown document you're working on.
You can search the text and tags of just your photos, or across the entirety of Flickr. An 'upload and embed' command is also available for uploading a new image up to Flickr and either linking or embedding it in the document you're working on. You can also browse your own Flickr account with a simple viewer that organizes your photos by sets.
Basically: Brett made one of - if not the - coolest Flickr blogging plug-ins, which just happens to work with the powerful and flexible TextMate, and all he asks for any of his creations is a donation. If you find his hard work useful, I definitely recommend you show him some PayPal love.