Are there really good reasons to use the iframes tag? Just a question 'cause I often see a heading into iframes w/o thinking about the sense. This is a more religious question and my opinion is to avoid iframes except there's no other way.
Also I'd never use the HTML portlet to display content since the HTML container cannot be reused and is pretty bad to manage (hard to find the potrlet location when having multiple portal pages, cannot apply an access control list, etc). I'd recommend to create dynamic pages or to use URL Service provider. Detlef Mueller