wow - I love the look of your newsletter!

Pix-resizer is the best free program that I've found - it does the job you want it to

Some of the boxes you have at the top of the page are pretty small, yet you have some white space down the right of the page. Why not move things a little to the left (so they are equal on both sides) and create a little more room. You could then increase the boxes & their font size.

I would consider adding a really obvious link to your main page - perhaps make the banner across the top link to it when it it clicked?

Overall I really like it