As you get into writing modules for the Linux kernel, you become part of a larger community of developers. Within that community, you can find not only people engaged in similar work, but also a group of highly committed engineers working toward making Linux a better system. These people can be a source of help, of ideas, and of critical review as well—they will be the first people you will likely turn to when you are looking for testers for a new driver.
The central gathering point for Linux kernel developers is the linux-kernel mailing list. All major kernel developers, from Linus Torvalds on down, subscribe to this list. Please note that the list is not for the faint of heart: traffic as of this writing can run up to 200 messages per day or more. Nonetheless, following this list is essential for those who are interested in kernel development; it also can be a top-quality resource for those in need of kernel development help.
To join the linux-kernel list, follow the instructions found in the linux-kernel mailing list FAQ: http://www.tux.org/lkml. Please read the rest of the FAQ while you are at it; there is a great deal of useful information there. Linux kernel developers are busy people, and they are much more inclined to help people who have clearly done their homework first.
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