You want to place your Flickr Photo Stream in your Blogger Sidebar, but you have no idea how you would accomplish this task. This post will walk you through the process.
First, go to Flickr and copy the embed code from your Photo Stream.
After you have that code, you can go to you Blogger account. Go to the Layout section and add a HTML/JavaScript Gadget. Then you will need to click on edit to adjust the size of the gadget.
When you are in the HTML/JavaScript editing window, you will see two numbers. They are circled in red in the photo below. You can adjust the size by experimenting with the numbers. I found that 200 and 200 worked really well for my blog.
When you are finished, it will look something like the one below. Enjoy!