David,
Can you explain what you mean by "integrate"? OpenACS.org combines information from News, Forums, and several ETP instances on the home page. It uses templates that are included into the etp template for a custom application we created.
You can use the include tag in the etp templates such as article-index or article-content to add information. The lars-blogger package is nice because it comes with an includable template called blog which you can include in any adp.
If you want to include dynamic pages inside ETP content, there is no way to do that now.
