You probably tried to press the buttons on the wiimote or even tried to shake it, but nothing happens in the end and the 4 LEDs just keep blinking.
Don't be frustrated, it is because you do not have any programs that read the data from your wiimote and make use of it.
So here I introduce to you few of the wiimote libraries that I've tested anyway.
First, here comes the managed library which is WiimoteLib.
This library started out as an article at the Coding4Fun site and eventually many people use this to develop their projects with wiimote.
For a familiar example, it is also used by Johnny Chung Lee's projects which were posted in the previous post.
Here's a screensot to let you see how it is looked like.

Next, here comes a C library called Wiiuse.
It is one of the very first library that enable you to gain access to the wiimote with your PC, I guess.
For those who like to program in C language, you can go for it as its support for the wiimote is pretty good and it can support most of the bluetooth stack theoritically.

In case that you would like to program in Java, there is a Java wrapper for the Wiiuse above called WiiuseJ.
It is supposed to be able to do whatever the Wiiuse can do though.

Lastly, it is a great news for those who love C++, there is an excellent library for C++ which is WiiYourSelf!.
It is a fully featured library which supports everything from the wiimote even the speaker and vibrator.
This is the library that most recommeded by me as it is really easy to use though.

Here I've introduced several libraries tested by me.
In case you want to know more other libraries available, feel free to visit the URL below.
http://www.wiili.org/index.php/Wiimote_driver