Slow page loads on forum - need to revise /etc/my.cnf

Mysql Status report

Threads: 16
Questions: 4384436
Slow queries: 209
Opens: 28007
Flush tables: 1
Open tables: 256
Queries per second avg: 14.783

Top output

===============================
4:45am up 3 days, 10:55, 1 user, load average: 0.25, 0.17, 0.17
71 processes: 68 sleeping, 2 running, 1 zombie, 0 stopped
CPU states: 16.2% user, 4.7% system, 0.0% nice, 79.0% idle
Mem: 512920K av, 494672K used, 18248K free, 48K shrd, 82168K buff
Swap: 1028152K av, 129508K used, 898644K free 171728K cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
16513 mysql 14 0 161M 43M 1768 S 9.6 8.6 0:00 mysqld
10698 nobody 11 0 8344 8084 5304 S 7.3 1.5 0:05 httpd
16565 root 14 0 1060 1060 824 R 1.1 0.2 0:00 top

copy of my.cnf
# Example mysql config file for large systems.
#
# This is for large system with memory = 512M where the system runs mainly
# MySQL.
#
# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is /var/lib/mysql) or
# ~/.my.cnf to set user-specific options.
#
# One can in this file use all long options that the program supports.
# If you want to know which options a program support, run the program
# with --help option.

# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /var/lib/mysql/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
set-variable = max_connections=200
set-variable = interactive_timeout=100
set-variable = wait_timeout=100
set-variable = thread_cache_size=256
set-variable = connect_timeout=10
set-variable = myisam_sort_buffer_size=32M
set-variable = key_buffer=16M
set-variable = join_buffer=3M
set-variable = record_buffer=3M
set-variable = sort_buffer=5M
set-variable = table_cache=1024
skip-locking



port = 3306
socket = /var/lib/mysql/mysql.sock
skip-locking
set-variable = key_buffer=256M
set-variable = max_allowed_packet=1M
set-variable = table_cache=256
set-variable = sort_buffer=1M
set-variable = record_buffer=1M
set-variable = myisam_sort_buffer_size=64M
set-variable = thread_cache=8
# Try number of CPU's*2 for thread_concurrency
set-variable = thread_concurrency=8
log-bin
server-id = 1

# Uncomment the following if you are using BDB tables
#set-variable = bdb_cache_size=64M
#set-variable = bdb_max_lock=100000

# Uncomment the following if you are using Innobase tables
#innodb_data_file_path = ibdata1:1000M
#innodb_data_home_dir = /var/lib/mysql/
#innodb_log_group_home_dir = /var/lib/mysql/
#innodb_log_arch_dir = /var/lib/mysql/
#set-variable = innodb_mirrored_log_groups=1
#set-variable = innodb_log_files_in_group=3
#set-variable = innodb_log_file_size=5M
#set-variable = innodb_log_buffer_size=8M
#innodb_flush_log_at_trx_commit=1
#innodb_log_archive=0
#set-variable = innodb_buffer_pool_size=16M
#set-variable = innodb_additional_mem_pool_size=2M
#set-variable = innodb_file_io_threads=4
#set-variable = innodb_lock_wait_timeout=50

# Point the following paths to different dedicated disks
#tmpdir = /tmp/
#log-update = /path-to-dedicated-directory/hostname

[mysqldump]
quick
set-variable = max_allowed_packet=16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[isamchk]
set-variable = key_buffer=128M
set-variable = sort_buffer=128M
set-variable = read_buffer=2M
set-variable = write_buffer=2M

[myisamchk]
set-variable = key_buffer=128M
set-variable = sort_buffer=128M
set-variable = read_buffer=2M
set-variable = write_buffer=2M

[mysqlhotcopy]
interactive-timeout