we can do a lot of things that depends on the time of your free time. any one have some good idea share it with me. perhaps today it is a start point.
my point:
1. write device driver
2. write something to change the kernel permformance
3. write a new file system
4. write a security module add to linux
5. write a hacked module that monitor other users.
6. write some user space promgae into kernel.　　　　　　

  说点具体的吧，现在就可以开始的具体的事情，我们是能够做很多事情，但比如写驱动起码要写一个还没有人写的，但是又要有足够的硬件资料。　　　　　　

i had read the source for little time.
when i reading .i am writing something.but before u do something, you must know something .

1. write device driver

yes , i had write a virtual ethernet netcard driver to as a tunnel of a vpn.

2. write something to change the kernel permformance

i had changed the ip stack to do somthing.just little.

3. write a new file system

i had just write a char device.it's to large for u to write a file system.

4. write a security module add to linux

i had write some little lkm firewall module.

5. write a hacked module that monitor other users.

yes ,accord the book ,to catch the system call.

6. write some user space promgae into kernel.

i can't understand this .can you tell me what are u meaning.

i agree with u .when we learn something , let's try to use it.is't it .

　　　　　　

  把你的成果贴出来吧，很想看看阿 　　　　　　

i am very  happy hear this
i want to take part into you
i think we can do well
　　　　　　

this is english canner？
：-（我的句子有语法错误没有？）
我觉得还是把一些最基本的事做了，对操作系统做一个很有启发性的诠释。我想很多人对操作系统不是有很刻的了解吧！　　　　　　

Glad to see so many people interesting this subject.During my linux studying, the site that impressed me most is sourceforge, i think we should have a chinese sourceforge,
We can use CVS as develop environment, start to contrib something to the development for linux.At the same time, we can communicate with each other for advice and suggestion. I hope we form a group that could share something with each other. Sharing is good for everybody. I personly have no mature idea what we shoud do,perhaps let's start a simple one maybe. 　　　　　　

wating for u .　　　　　　

我认为现在应该先认真阅读源代码，至于修改乃至重新设计还不太现实，毕竟一口吃不成胖子嘛。　　　　　　

That is a good idea. Making a sourceforge.