First you'll have to configure an external blog, (do that here). You'll be guided through the set-up process, and at the end you can try a test post to make sure everything works.
When that's done, you can blog any public photo you see on Flickr. When you're looking at a single photo, for example, http://www.flickr.com/photo.gne?id=23754, you'll see a "Blog This" button above it.
Note: If you don't see the "Blog This" button, you probably need to make the photo public (click "edit" next to the privacy indicator under "Additional Information" on the photo's page).
Click the "Blog This" button for the photo you want to post. If you've set up your blog, you can post immediately by adding a title and body for the post. There's a link to your blog as well so you can check that the entry looks OK.
You can set up as many blogs as you like.
You can also create your own Flickr moblog. When you upload a photo to Flickr via email, and you have at least one blog set up in Flickr, we can post your photo to your blog automatically. Check your settings here.
We currently support the following blogs:
*Note: If you recently migrated your Blogger blog to the new Blogger Beta, you will need to delete the existing blog entry in your blog settings and generate a new one.
**Note: If you use a Movable Type v4 blog, you don't use your normal password to log in. When you edit your user account on your blog host, there's an option called:
Web Services Password
There is an option to reveal it (it's an MD5-type hash), and you should use that as the password for the configuration on Flickr, not your normal password.
There are a number of additional elements you can add to your blog template to display things like a link to your profile or the date that a photo was uploaded.
Here's a list of additional tags you can add.
You can send photos straight from your phone to your blog via Flickr. First set up your blog in Flickr, and then get yourself a special email address to send your photos to.
Each member of Flickr can get a specific 'Upload2Blog' email address. Set yours up here. When that's done, photos uploaded to the new address will be blogged automatically and posted into your Flickr photostream.
When you upload photos via email, use the subject line to give your photo a title, and the body of the email to give it a description. These will be carried over to your blog entry, if you specify this on the set up page mentioned above.
There is a really simple mobile version of Flickr available too, though you can only log in to it if you have a Yahoo! ID.
Unfortunately, you can't do anything to stop this automatically. We need to remove each kind of signature as they come up. There's a thread in FlickrBugs where you can report new ones, and we get to them as soon as we can.
In the meantime, you could omit the body of your email in the post you make to Flickr (and your blog), or just delete the crud when you edit in Flickr.
Yes! As a matter of fact, there is! You can create a Flash or HTML badge using our nifty Flickr Badge generator.