The Reddit Stacks allows you to easily display your or someone elses posts on Reddit.com in a simple but powerful widget on your website. The widget itself doesn't use many pictures and is therefore really fast and reliable regarding rendering. It refreshes every time the user posts something new on Reddit and you can also customize the Stack in some ways: you can either use your own Reddit.com profile name or one from someone else you're inspired by, you're able to change the amount of posts that should be displayed in the widget (5, 10 or 20) as well as sorting options of the links/posts from top, new or hottest.
Reddit works fantastic with every kind of stack you use on your sites, even third party stacks from other developers are fully supported. Simply drag and drop the stack out of your Stacks library to your existing Stacks site and customize it by using the given Settings HUD on the right hand side of your screen.
Still not convinced? Check out this Getting Started Screencast we recorded: