The Blogger Image Resizer (BIR) resizes all the images on a blog that includes the javascript in the blogs header. Just one simple line of code and it resizes all of blogger's pictures to the highest possible quality.

To use BIR just go to the Layout tab in your blog. Click the "Edit HTML" tab at the top. Then scroll down until you see this line:

<title>"Your Blog Title"</title>

Right after that line paste this in:

<script src='http://blogger-img-resizer.googlecode.com/files/img.js' type='text/javascript'></script>

Then click the "Save Template" button below. Refresh your blog and you should have all the images nice and big.