Google Sites/Google Checkout Rant

Does anyone know why Google doesn't allow its very own Google Checkout to be added to a website created in Google Sites?

I think it's ridiculous that it's neither possible to add Google Checkout nor Paypal buttons. The html code check as you save a page after editing the html cleans the embedded button code right out. I can't think of something more aggravating *knock on wood* than this type of MAJOR disconnect or miscommunication between Google products!

Does anyone have a workaround or alternative? I've been looking all over the Google Sites Help Group to no avail. Is there relief for this huge disconnect? GOOGLE GET YOUR ACT TOGETHER!!