Posting Photos from Flickr.
This is how I post pics from Flickr (there may be better ways, but this is what I do, lol):
* Select a photo I want to post.
* Left-click on it to magnify it.
* In top right corner it says :"View all sizes".
* Click on the middle box.
* I picked "medium 500".
* Right-click the photo on "Copy image URL".
* Go to BYGC and click "img".
* Paste the URL between the 'img's, and enter.
Voila, it seems to work.
Then you can play around later with different sizes.