Hey, great to hear that you're using the multiple site functionality.
Actually, I haven't tested this across multiple sites, but it may work. If you have one page with content and you'd like to show that page's content on another page, you can simply use this placeholder on the other page:
[{page_####}]
where #### is the ID of the first page. So for example, if the first page has an ID of 8005, and you want to display that page's content on another page, you simple put this in that page's content area:
[{page_8005}]
I *think* that should work across multiple site pages as well. Give it a try and let me know if it does.
Thanks,
- Nick