I dunno all the details from 2005's tournament (I didn't have time this year to follow it, unfortunately). In 2004 there was both Technical and Freestyle, and I'm hoping we'll see both again this year.
You'll likely want to make a routine of sorts, but that just comes with practice. Get several songs you enjoy and are really comfortable with on either standard/trick or heavy/maniac, and start to work in other moves than simply the steps - I.E. specific arm and body motions, spins, switches, etc. Also, don't try to trick out the entire song. You'll get fancy at a couple of points, then you'll "find" another spot you can be fancy with, and it'll build until you have a routine that almost flows naturally. I have a 3-song freestyle grouping I use at the arcade that consists of 2 Standards and an Oni, and I can combo out the set while freestyling it, so once you get going, then you just need the practice.
Also, two important rules, regardless of what you go with: Try not to look down at the pad during the routine (you can lose points for that), and NEVER TOUCH THE BAR! One of the guys at the tourney I went to grabbed the bar on his second routine, and it cost him is top 3 spot.
I'm sure several people who are much better than I am at this can give even better advice, but that's definitely a few basics.
PezCat