other then a bit $$$ it will be just fine for web browsing...
heck im on my g3 600 with 384mem and camino browser writing this responce...and it's fine as basic web machine
some tips if he gets...
-in dock use scale effects and no mag or animate...also turn wallpaper off and use colored
-turn off dashboard and turn off spotlight,if has bluetooth turn that also off
To turn Dashboard off: use terminal
defaults write com.apple.dashboard mcx-disabled -boolean YES
You have to restart the Dock after making either change for it to take effect:
killall Dock
To turn Spotlight off: use terminal
cd /etc
sudo nano hostconfig
SPOTLIGHT=-NO-
ctrl-x
y
enter
Then to get rid of the existing index, run these two commands
sudo mdutil -i off /
sudo mdutil -E /
reboot computer
install camino browser and lastest version of flash
note in camino you can set to block flash and web adverts
note: with tiger 10.4.11 updates will not give you latest itunes so google for version 9.2.1 (5)
good luck