Hi,
Our current server is an Apple XServe with the following specs:
Dual 1.33GHz PowerPC G4
2MB L3 cache per processor
1.5GB DDR333 SDRAM
60GB ATA/133 ADM
Mac OS X Server
Dual Gigabit Ethernet
CD-ROM slot load drive
ATI graphics card with VGA
We are running Apache with the following 'general' config:
StartServers 10
MinSpareServers 32
MaxSpareServers 64
MaxClients 500
MaxRequestsPerChild 100000
ServerSignature Off <- *Security Tip*
ServerTokens ProductOnly <- *Security Tip*
We are also running MySQL with the following 'general' config:
[client]
port=3306
socket=/tmp/mysql.sock
[mysqld]
port=3306
socket=/tmp/mysql.sock
set-variable = wait_timeout=90
set-variable = sort_buffer=8M
set-variable = myisam_sort_buffer_size=64M
set-variable = join_buffer=3M
set-variable = record_buffer=3M
set-variable = max_allowed_packet=1M
set-variable = thread_concurrency=16
set-variable = thread_cache=8
set-variable = table_cache=1500
set-variable = thread_cache_size=256
set-variable = max_connections=200
set-variable = max_connect_errors=1000
set-variable = interactive_timeout=60
server-id = 1
datadir = /var/mysql/
basedir = /usr/pid-file = /var/mysql/mysql.pid
log-bin = /var/mysql/mysqlbinlog
user = mysql
[myisamchk]
set-variable = key_buffer=64M
set-variable = sort_buffer=64M
set-variable = read_buffer=16M
set-variable = write_buffer=16M
If anyone has tweaking tips, please let me know. I would like to run a PHP Cache program, however Mac OS X is not support by any programs that I know of. We have a little more than 500 students who generate roughly 8,500 clicks per day. Although, it would be nice if we could see the config files for www.moodle.org 
(I'm still learning how to config apache and mysql.)
Aight L8rs,
_chris