Rearranging lists! That’s like, the most amazing thing ever! Wow am I excited about rearranging lists. I’m going to stay home tonight and rearrange lists.
Fine, don’t click the link. I dare ya 
Drag & Drop Sortable Lists with JavaScript and CSS
In Web applications I’ve seen numerous — and personally implemented a few — ways to rearrange items in a list. All of those were indirect interactions typically involving something like up/down arrows next to each item. The most heinous require server roundtrips for each modification…boo.
Then I came across Simon Cozens’ example of rearranging a list via drag & drop. I was so inspired I had to try it out myself.