22:21:17  up 28:25,  0 users,  load average: 0.27, 0.38, 0.43
133 processes: 132 sleeping, 1 running, 0 zombie, 0 stopped
          total    6.6%    0.0%    1.9%   0.0%     0.9%    9.5%   80.9%
Mem:  1030560k av, 1011240k used,   19320k free,       0k shrd,   10724k buff
                   843712k actv,   79480k in_d,   14236k in_c
Swap: 2048276k av,  189088k used, 1859188k free                  608484k cached



Http processes currently running = 36
Mysql processes currently running = 2

Netstat information summary
     2  FIN_WAIT2    
     5  CLOSE_WAIT  
     5  FIN_WAIT1    
    11  SYN_RECV    
    33  LISTEN      
    94  ESTABLISHED  
   599  TIME_WAIT    

+--------------------------+------------+
| Variable_name            | Value      |
+--------------------------+------------+
| Aborted_clients          | 116        |
| Aborted_connects         | 1          |
| Bytes_received           | 395448222  |
| Bytes_sent               | 3734009046 |
| Com_select               | 111891     |
| Com_set_option           | 2608       |
| Com_update               | 59761      |
| Connections              | 41669      |
| Created_tmp_disk_tables  | 314        |
| Created_tmp_tables       | 9213       |
| Created_tmp_files        | 0          |
| Flush_commands           | 1          |
| Handler_delete           | 9778       |
| Handler_read_first       | 7482       |
| Handler_read_key         | 851716     |
| Handler_read_next        | 16251079   |
| Handler_read_prev        | 2882233    |
| Handler_read_rnd         | 108148     |
| Handler_read_rnd_next    | 283574976  |
| Handler_rollback         | 0          |
| Handler_update           | 647212     |
| Handler_write            | 210481     |
| Key_blocks_used          | 11636      |
| Key_read_requests        | 2419489    |
| Key_reads                | 10189      |
| Key_write_requests       | 167511     |
| Key_writes               | 18228      |
| Max_used_connections     | 10         |
| Not_flushed_key_blocks   | 0          |
| Not_flushed_delayed_rows | 0          |
| Open_tables              | 400        | 100% of table_cache in use
| Open_files               | 782        |
| Open_streams             | 0          |
| Opened_tables            | 1587       |
| Questions                | 5186091    |
| Qcache_queries_in_cache  | 3888       |
| Qcache_inserts           | 96511      |
| Qcache_hits              | 4898975    |
| Qcache_lowmem_prunes     | 2639       |
| Qcache_not_cached        | 15372      |
| Qcache_free_memory       | 4954616    |
| Qcache_free_blocks       | 1239       |
| Qcache_total_blocks      | 9702       |
| Rpl_status               | NULL       |
| Select_full_join         | 67         |
| Select_full_range_join   | 12         |
| Select_range             | 1965       |
| Select_range_check       | 0          |
| Select_scan              | 64756      |
| Slave_open_temp_tables   | 0          |
| Slave_running            | OFF        |
| Slow_launch_threads      | 0          |
| Slow_queries             | 3          | (execution time > 10 secs)
| Sort_merge_passes        | 0          |
| Sort_range               | 2245       |
| Sort_rows                | 93358      |
| Sort_scan                | 25012      |
| Table_locks_immediate    | 204162     |
| Table_locks_waited       | 116        |
| Threads_cached           | 9          |
| Threads_created          | 11         |
| Threads_connected        | 2          |
| Threads_running          | 1          |
| Uptime                   | 15576      | 4 hrs 19 mins 36 secs
+--------------------------+------------+


Key Reads/Key Read Requests = 0.004211  (Cache hit = 99.995789%)
Key Writes/Key Write Requests = 0.108817
Connections/second = 2.675 (/hour = 9630.740)
KB received/second = 24.793 (/hour = 89255.547)
KB sent/second = 134.640 (/hour = 484703.621)
Temporary Tables Created/second = 0.591 (/hour = 2129.353)
Opened Tables/second = 0.102 (/hour = 366.795)
Slow Queries/second = 0.000 (/hour = 0.693)
% of slow queries = 0.000%
Queries/second = 332.954 (/hour = 1198634.284)
MySQL Query Cache hits = 4898975/5010858(98%)

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-locking
skip-innodb
query_cache_limit=1M
query_cache_size=16M
query_cache_type=1
max_connections=100
interactive_timeout=20
wait_timeout=20
connect_timeout=10
thread_cache_size=50
key_buffer_size=64M
join_buffer_size=1M
max_allowed_packet=16M
table_cache=400
record_buffer=1M
sort_buffer_size=768K
read_buffer_size=1M
read_rnd_buffer_size=768K
max_connect_errors=5
thread_concurrency=2
myisam_sort_buffer_size=32M
log-bin
server-id=1

[mysql.server]
user=mysql
basedir=/var/lib

[safe_mysqld]
err-log=/var/log/mysqld.log
pid-file=/var/lib/mysql/svr01.pid
open_files_limit=8192

[mysqldump]
quick
max_allowed_packet=16M

[mysql]
no-auto-rehash
#safe-updates

[isamchk]
key_buffer=32M
sort_buffer=32M
read_buffer=8M
write_buffer=8M

[myisamchk]
key_buffer=32M
sort_buffer=32M
read_buffer=8M
write_buffer=8M

[mysqlhotcopy]
interactive-timeout

.7.8 loads in my opinion is not a reason to buy more ram. Try optimizing your box first.