On Linux:

adb push fre3vo   /data/local/tmp
adb install Superuser.apk
# from Vision-fre3vo-temp-root.zip
adb push su       /data/local/tmp
adb push fixsu.sh /data/local/tmp
adb push busybox  /data/local/tmp
adb shell

In adb shell:

chmod 777 /data/local/tmp/fre3vo
/data/local/tmp/fre3vo -debug -start FAA90000 -end FFFFFFFF

Dropping back to Linux!

~ $ adb shell
# /data/local/tmp/fixsu.sh
# exit

Yeah, this time it's root! Now run Titanium Backup *root* and save everything to SD Card!

see Google

/data/local/tmp/misc_version -s 1.33.405.5

On Linux:

adb push psneuter /data/local/tmp/
adb push hboot-eng.img /data/local/tmp/
adb push busybox /data/local/tmp/
adb push flashgc /data/local/tmp/
adb push gfree /data/local/tmp/
adb push root_psn /data/local/tmp/
adb push recovery-clockwork-touch-5.8.1.0-vision.img /data/local/tmp/recovery.img
adb push su /sdcard/
adb push Superuser.apk /sdcard/
adb shell

In adb Shell:

chmod 755 /data/local/tmp/* 
/data/local/tmp/psneuter

In Linux:

adb shell

In adb Shell (note the '#' sign):

cd /data/local/tmp 
./gfree -f -b hboot-eng.img -y recovery.img 
./root_psn
sync

References:

* http://wiki.cyanogenmod.org/w/Install_CM_for_vision
* http://forum.xda-developers.com/showthread.php?t=1178912
* http://forum.xda-developers.com/showthread.php?t=905261
* http://forum.xda-developers.com/wiki/index.php?title=HTC_Vision#Rooting_the_Vision_.28G2.2FDZ.29_and_DHD
* 

To get Wifi access by use of common QR Code scanners, you have to QR encode the string WIFI:S:MySSID;T:WPA2;P:MyPassword;; which can be generated with the open source tool qrencode:

qrencode -t PNG -s 12 -l L -o MyNetwork.png 'WIFI:S:MySSID;T:WPA;P:MyPassword;;'

Apart from replacing MySSID and MyPassword by the right values for your network, you might need to replace WPA by WEP. I was told, a WPA2 might work as well, but WPA seems to be generic for both WPA and WPA2.

For a hidden network, a H:true is expecte as a last value, seperated by another ; and finished by a pair of them. In case of no password (no encryption), just omit the respective tags completely¹⁾.

References:

• Wifi Network config (Android)
• Tries with the QR Code generator from the ZXing project

Thanks to Generate QR Codes for WiFi networks for pointing out the basiscs.