Hi,
As you might know I also do some nice plugins for WordPress.
The coolest one is the advanced iframe where you can include any webpage with an iframe.
But it also can modify the parent page, the page itself and now in version 3.0 directly embed a page with jquery.
If you use WordPress you should take a look:
http://www.wordpress.org/extend/plugins/advanced-iframe
Have fun using this plugin,
Best, Michael