As you may have seen on some blogs, Microsoft now enables you to include any Excel file -or parts thereof- in your web pages and blog posts.
For example (yes you can make changes to the cells, they are not retained):
I have written an article that explains how this is done.
Even more: I have also created a demo where you can enter information in a web form (a textbox), which in turn updates information in the embedded Excel web app file.
Enjoy the read: Embedding Excel files on your website
Jan Karel Pieterse