I recommend using the 2.6.19-rc6 kernel with the j7xx userlands. 
There are still a few issues with the 2.6.24-stable branch yet which makes it less usable than 2.6.19-rc6.

These are the most common keyboard shortcuts used in icewm to make your life easier:

ctrl+esc opens the 'start menu'
alt+tab cycles through open windows/applications
alt+f11 (word key) full screens any active window/application
alt+f10 maximizes active window/application
alt+f9 minimizes active window/application
alt+f4 closes active window/application
ctrl+alt+h hides the taskbar
ctrl+alt+f1 from inside icewm brings you to console
ctrl+alt+f2 brings you back to icewm desktop
ctrl+alt+backspace kills X11 and brings you back to console
alt+f1 - f3 in console to switch between 3 virtual consoles
type 'reboot' in console to properly shut down the system, then pull the battery.

A full list of shortcuts can be found in ~/docs along with a readme on how to get the system monitor 
to show wireless signal strength.

The mouse icon on the taskbar is used for left/middle/right click. Just click it to desired 
mouse click. Its also mapped to the windows key for right click, but it only seems to work 
in certain applications like minimo and firefox using the win key for right click.

Most important of all.. do not use ipkg upgrade. Currently it causes the useland to break 
badly. This issue is being worked on. You can use ipkg update, just dont use ipkg upgrade.

Cheers.