In the header of all the pages in our site we have a region that shows how many items users have in their shopping cart, plus the total price and finally a "Checkout" button. Obviously these items cannot be cached, so full page caching isn't an option. However on many pages in the site, the shopping cart at the top of the page is the only dynamic content that is likely to change regularly, so I'd definitely like to make use of some caching functionality.

Is it possible to use partial caching with ASPX templates? The documentation for this discusses only web parts, so I presume this functionality is only available when using the Portal Template engine. If that's the case, what are the possibilities for caching when using ASPX templates?

Cheers,
Jimmy