• There is no battery indicator
• You can't watch the CPU temperature
• and you can't set the CPU frequency governor

Of course you can use gkrellm for the first two but it does not play nicely with dynamic window managers like wmii. If I wanted to drag windows around I'd use Gnome, thank you. It is much nicer to change the right side of the status bar to show current temperature and battery status. 

Beware! This change is for the sh script version of wmiirc. If you are using the other version this may not work.

In file: ~/.wmii-3.5/wmiirc change the part that says

# Status Bar Info
status() {
        echo -n $(uptime | sed 's/.*://; s/,//g') '|' $(date)
}

to

# Status Bar Info
status() {
	BAT=`acpi -b`
	LEFT=`echo $BAT | cut -d ',' -f 2`
	TEMP=`acpi -t -B -c | cut -d ',' -f 2 | cut -d "." -f 1`
	LOAD=$(uptime | sed 's/.*://; s/,//g')
	DATE=`date +"%d/%m/%y %R:%S"`
	echo -n T: $TEMP '|' B: $LEFT '|' $LOAD '|' $DATE
}

You can of course keep the longer date format by changing "$DATE" to $(date) but I like it shorter.

Now on to the Frequency Governor! You can download the script below and put it in ~/.wmii-3.5 . Don't forget to make it executable.

cpufreq @ SymbolEngine

Now when you run the cpufreq action you will be asked for your password. This is because CPU governor can only be changed by root user. After that you'll get a nice dmenu on top of the screen to choose a governor.

I hope you find these scripts useful.

1. Go to settings/system menu on your GP2x
2. Make sure the IP Address is 10.1.0.1
3. Turn on telnet, ftp, samba and web servers (You wont need samba if you are using a real operating system)

If you are running Linux:

1. ifconfig usb0 up 10.1.0.2
2. now you should be able to ping the device with:
   ping 10.1.0.1

If you are running m$ windows (Who said windows is easier to manage?):

1. You will probably need USB Gadget driver for windows. Most flavors come without it. Download and install:
   Download USB Gadget Driver for Windows @ M$
2. Turn on your GP2x. A baloon will pop up (don't you hate them?) to say connection is established. 
3. Go to Control Panel -> Network Connections.
4. Open TCP/IP properties of "Linux USB Ethernet / RNDIS
5. Manually configure it with an IP of "10.1.0.2" and a subnet mask of "255.0.0.0"
6. You should be now able ping your device from command shell with:
   ping 10.1.0.1

Now you can also telnet to your GP2x, transfer files with samba (means: windows file sharing) or ftp.

There is also a pretty complete web server with even PHP installed running there. PHP I tell ya! Have fun!