Linux Kernel !!

Hi,Maybe I am not the first one to ask such a question...but couldnt stop myself either...I have read all the relevant books on linux...such as LKD & LDD. I have tried getting some projects on soureforge.net as well ...however, i have not been lucky so far.I want to land up with a job in Linux Kernel but everywhere I get rejected for lack of practical experience.Dont know what to do to get relevant practical experince which gets counted and helps me land up with a job.I am low on morale and confidence...pls suggest.Regards,Sakshi