Get query with custom posts and custom post types via custom taxonomies

I am looking to display some featured objects at the top of my site, based on category/taxonomy, for multiple types.

Basically, I have a custom post type, “Reviews” that has a custom taxonomy, “Platforms”.

Platforms has an entry called “PC”.

I also have my standard “post” type, which has categories including “PC”.

I’m looking to display anything that has a category/platform set to “PC”. Basically I want to show the user everything that has to do with PC, whether it be a normal post or my custom Review type.

It looks like it has grouped the PC category and PC taxonomy with the same ID in the wp_term_taxonomy table.

When I use the following it gets me all posts that have the category of “PC” applied to them.

query_posts('showposts=3&cat=78&offset=0&post_type=post');

How do I add the “Reviews” with a platform of PC to the list? I’ve tried many things, including..

query_posts('showposts=3&cat=78&offset=0&post_type=reviews&post_type=post&platforms=pc');

But I can’t get it to return the custom post type..