Its like being a conductor on stage the way you can freely move your arms around while retaining complete control of the music.
Since this is a new approach to DJing, the techniques are in its beginning stage. Right now WiiJing uses button pressing commands interlaced with movement commands for a total physical/audio experience. The main advantage of this style of DJing is the wireless freedom and ability to control unlimited controls in the palms of your hands. Each map is given a version number as minor details may be changed due to whatever reason. This way you can refer to the latest layout or look at older versions and find something you like.
If you are thinking of using the infared sensors to control things, you might be out of luck. Using this tool in a DJ setting might create problems for the infared sensors, its unknown right now if the Wiimotes will function in that type of lighting enviornment. If it does work reliable enough, then that opens up more options for controls. Otherwise it might create problems if you rely on using the IR for something only to find out the strobe facing you is causing havok on the sensor!
As far as technique goes, currently I've found a few things. One is to control Traktor using the Wiimote as a mouse. This is nice because you can do whatever, but its not really very much better than using a mouse to mix (which a mouse would end up being more reliable in the long run). Instead, i've mapped out 2 wiimotes to respond to different key strokes on Traktor. By going into Traktors settings I could set Play/Cue to H . Then i would set the A button to letter H. Thus completing the process and allowing A to control Play/Cue. Depending on your style and what you know in Traktor is what will determine what you want your Wiimote layout to be. Once you are familiar with the button pressing commands you can move on to motion controls and WiiJ customization (for advanced users).
In most layout cases the Wiimote is equipped with a Alt Action trigger. This trigger adds twice the amount of features as non pro controls and adds extra safety. The safety features include being able to block an accidental push of the stop/play/loadtrack etc. The Alt Action trigger is set to act as a barrier from slips of the thumb. In some customizations the "trainwreck" buttons can be made to only be triggered when the Alt Action is held down. Otherwise if pressed without Alt Action nothing would happen (or quite possibly you may prefer to assign that un-Alt spot to another control. For me, unless i find a new trigger i NEED to add, i'll try to leave those spots empty just so my fingers dont even want to push them.
A very very basic WiiJ layout is The Transport Pro. The Transport Pro is a layout that allows the DJ to function with just one Wiimote, acting as a basic transport. This could be used if the setting is a low key, no pressure to mix or blend. More jukebox controls than mixing tools, but just as effective if you want to wirelessly control your mix from away from the DJ booth (depending on how good your Bluetooth is). There are some Alt Action mixing controls if you wanted to mix something without having to change the control scheme, but for the most part all of the face buttons work well as a 1 piece wireless transport. This is almost as basic as it gets.
You may prefer a different layout than the one I use (mine seem to be ever changing with each new advance and idea), and that is the great thing about this as well, its fully customizable. Any ideas you may come up with have a very good chance of being done (within reason), if it already hasn't. You just need to get the hang of programming with GlovePie. Its not as complicated as it may seem, since I had never done any programming code before this and seemed to succeed this far with FAQs and websites like this (regarding GlovePie Programming).
As more techniques are developed and more codes are written, this technique area will fill up. For now refer to the How To section to use the "Fundamental Dual Wiimote Dj Setup". Next try your moves with the Flickstart Fundamental (which has 1 obvious difference). Then if you are feeling like you have the hang of things move on to the WiiMixer for more controlling options. More setups will become available as soon as they are made. Setups using 3 or more Wiimotes, setups using motion, IR, pressing combinations of buttons to create new triggers, all of these are possible avenues for creativity.