Alright, with my 2.3.4 update I have tested ZergRush method of rooting and here is my result:
"01/004/2012 13:04:48 - INFO - Connected device : R800
01/004/2012 13:04:48 - INFO - Installed version of busybox : N/A
01/004/2012 13:04:48 - INFO - Android version : 2.3.4 / kernel version : 2.6.32.9-perf
01/004/2012 13:04:53 - INFO - Pushing C:\Flashtool\.\devices\R800\busybox\1.19.0\busybox to /data/local/tmp/busybox
01/004/2012 13:04:54 - INFO - Pushing C:\Flashtool\.\custom\root\zergrush.tar.uue to /data/local/tmp
01/004/2012 13:04:55 - INFO - Running part1 of Root Exploit, please wait
01/005/2012 13:05:14 - INFO - Waiting for device
01/006/2012 13:06:14 - INFO - Forced stop waiting.
01/006/2012 13:06:14 - INFO - Running part2 of Root Exploit
01/006/2012 13:06:14 - INFO - Running rootit2
01/006/2012 13:06:14 - ERROR - Cleaning rootit files
Mounting /system R/W
FTError
01/006/2012 13:06:14 - INFO - Pushing C:\Flashtool\.\devices\R800\busybox\1.19.0\busybox to /data/local/tmp/busybox
01/006/2012 13:06:15 - INFO - Pushing C:\Flashtool\.\custom\root\psneuter.tar.uue to /data/local/tmp
01/006/2012 13:06:15 - INFO - Running part1 of Root Exploit, please wait
01/006/2012 13:06:15 - INFO - Running rootit
01/006/2012 13:06:17 - INFO - Waiting for device"
It eventually froze at waiting for device doing both methods.
"01/004/2012 13:04:48 - INFO - Connected device : R800
01/004/2012 13:04:48 - INFO - Installed version of busybox : N/A
01/004/2012 13:04:48 - INFO - Android version : 2.3.4 / kernel version : 2.6.32.9-perf
01/004/2012 13:04:53 - INFO - Pushing C:\Flashtool\.\devices\R800\busybox\1.19.0\busybox to /data/local/tmp/busybox
01/004/2012 13:04:54 - INFO - Pushing C:\Flashtool\.\custom\root\zergrush.tar.uue to /data/local/tmp
01/004/2012 13:04:55 - INFO - Running part1 of Root Exploit, please wait
01/005/2012 13:05:14 - INFO - Waiting for device
01/006/2012 13:06:14 - INFO - Forced stop waiting.
01/006/2012 13:06:14 - INFO - Running part2 of Root Exploit
01/006/2012 13:06:14 - INFO - Running rootit2
01/006/2012 13:06:14 - ERROR - Cleaning rootit files
Mounting /system R/W
FTError
01/006/2012 13:06:14 - INFO - Pushing C:\Flashtool\.\devices\R800\busybox\1.19.0\busybox to /data/local/tmp/busybox
01/006/2012 13:06:15 - INFO - Pushing C:\Flashtool\.\custom\root\psneuter.tar.uue to /data/local/tmp
01/006/2012 13:06:15 - INFO - Running part1 of Root Exploit, please wait
01/006/2012 13:06:15 - INFO - Running rootit
01/006/2012 13:06:17 - INFO - Waiting for device"
It eventually froze at waiting for device doing both methods.