Giving each WordPress post a thumbnail, and display the thumbnail on the home page: Interesting tutorial on creating thumbnails for each post on your blog and using Custom Fields to add and display them on your front page. A word of warning: the process is hand crafted and labor intensive. Think of them as SnapShots for your WordPress posts, hosted on your own blog. I think this could be a very cool plugin that automagically builds thumbnails for your posts and stores them on your blog. Then a custom function that behaves like “recent posts” could display thumbnails of your posts on the front page. I see this feature being really useful for those who post a lot of multimedia such as videos and pictures. Thanks HackWordPress
[EDIT] Also, check out another Custom Fields thumbnail tutorial.