I guess the question becomes what data you want to show up somewhere else. All of the stuff you're looking at in that statistics page can be retrieved right from the server itself, outside of Plesk. Thus you could save whatever data you needed in whatever format you wanted to a plain text file, then call that into your iGoogle. Or anywhere else you wanted it for that matter.
To get ya started, here's a little shell script I've called load.sh that will grab text strings for the load average for last 5, 10 and 15 minutes, just like you'd see if you ran
top via shell. It writes the three values to three php variables into a file I've called load.php. I variablized them so if someone happens across my load.php page they'll see nothing. But I can use another php page to include the load.php file and grab the variables.
CODE
#!/bin/bash
#
# -----------------------------------------------------------------
TEMPFILE="$(mktemp)"
FTEXT='load average:'
# get first 5 min load
F5M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f1)"
# 10 min
F10M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f2)"
# 15 min
F15M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f3)"
echo ${F5M}
echo ${F10M}
echo ${F15M}
# The following will create the file load.php in the current directory when run manually
# or at /root/load.php when run from a cron job.
echo "<?php" > load.php
echo "\$loadavg5="$F5M";" >> load.php
echo "\$loadavg10="$F10M";" >> load.php
echo "\$loadavg15="$F15M";" >> load.php
echo "?>" >> load.php
exit
If you run it manually in shell (eg
sh ./load.sh) it'll echo the three values to the screen and save them to the load.php file. If you set it up as a cron job the load.php will default to get saved at /root/load.php if you don't tell the script otherwise. So you'd want to either save it somewhere else that's web accessible or move it after it gets saved.