Justin Smith has a great collection of tips for marketing your brand, company, product, or service on Facebook:

...most marketers lack a comprehensive understanding of the vast array of explicit and implicit marketing channels Facebook offers - most of which are viral. My goal here is to provide an introduction to what’s possible on Facebook to the spectrum of marketers from brand advertisers to volunteer grassroots evangelists.

Facebook offers many ways to get the word out and bring the people in. Here’s how to get started.

This is a great collection of advice for anyone who wants to get the most out of Facebook, whether you're a business or not... you can use it to advance your own personal agenda (Justin's tips will help me encourage my friends to build all sorts of insane things with electronics, for example) - Link

I've never been much of a Facebook application user, but I've got a backlog of requests from friends who use them... Scrabulous, IQ tests, vampires, etc. I poked around the Facebook application directory and I can sort by popular, active, and newest applications, but I got to wondering about the kinds of applications that would interest Hackszine readers: really neat hacks that use the platform in a freaky way, cool applications that a hacker put together in their free time, and interesting mashups that pull data from a variety of places.

Have you come across anything wild and hackish on Facebook? What can you tell me about the application and the author? What cool stuff is going on under the hood?