To define a Static IP Address on your Kindle do the Following:-
1. Home
2. Settings
3. Wirless Settings
4. Advanced (Bottom Left)
5. Other Network
6. Enter your IP Address (e.g. 192.168.0.2)
Subnet Mask (e.g 255.255.255.0)
Router Address (e.g. 192.168.0.1)
DNS Server (eg. 8.8.4.8)
Now return to the Wireless Network Screen, select your network and enter the wep or wpa key to connect
Great Hidden Features and shortcut keys can be found here ==> CLICK HERE
KINDLE SUPPORT