I have posted this to various threads discussing bricked kindles. There are a number of ways to fix your kindle as discussed in the forums, but a simple and reliable method is being developed. Read this:
Please give yifanlu some time to work on this project without distractions. Thanks.
In the mean time, if you want to invest the effort to learn existing recovery methods, check out ixtab's jailbreak. You can do some repairs from his runme.sh script. Please do not do anything to cause more damage to your kindle file system. It would be better to wait. Also, read the wiki's for the K4NT and for the Touch.