I am looking for info on how to display a site seal on my website?
I am planning on buying a certificate tomorrow and the company I will be using has a nice flash based seal …
Can I put it in a block? if so how?
Thanks 
create a banner with your code, and then create a block. If you are using an external .js for the seal (one where you click and it confirms) make sure you use https instead of http, other wise you will get a pop up saying your pages are not secure on your secured pages.