Load Averages problem - Suddenly it goes over 100+ - Any ideas?

[PsYxAkIaS (FreeBSD)]

Hi all again,

I am usually having 0.xx load averages but sometimes SUDDENLY it goes more than 100+ load averages and then it goes down again.

While it was having 97+ load averages i did 'top -n -S' but didnt show anything that wastes so much resources. 

I tried tcpdump if there was an incoming attack but didnt notice anything, I also checked ipfm, tcpstat, trafshow but there wasnt any badwidth usage.

I am worried for 3 things:
1. some type of attack
2. hardware problem
3. customer's program that wastes resources

Do you have ANY ideas? OR any utilities that will give me more information?

BEFORE:
-------
uptime
1:32PM  up 22 days, 14:09, 8 users, load averages: 0.11, 0.15, 0.17

AFTER some minutes:
-------------------
top -n -S
last pid:  8129;  load averages: 97.11, 38.51, 38.03  up 22+14:17:52    13:41:48
858 processes: 2 running, 856 sleeping
  
Mem: 247M Active, 34M Inact, 174M Wired, 14M Cache, 57M Buf, 952K Free
Swap: 1024M Total, 480M Used, 544M Free, 46% Inuse


  PID USERNAME      PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND
    2 root          -18   0     0K     0K wswbuf 213:28  2.83%  2.83% pagedaemo
42668 <username>      2   0  8312K  5460K select  18:39  0.73%  0.73% eggdrop-1
42075 <username>    -22   0 20228K  8908K swread  27:17  0.29%  0.29% eggdrop-1
16785 <username>      2   0 14768K 11544K select   8:15  0.15%  0.15% eggdrop-1
97981 <username>      2   0  8392K  5648K select  62:58  0.10%  0.10% eggdrop-1
32965 <username>      2   0  5124K  1028K select   3:32  0.05%  0.05% psybnc   
  937 <username>      2   0 23796K  4300K poll   216:35  0.00%  0.00% ircd
60963 <username>      2   0  4480K  2432K select 113:17  0.00%  0.00% eggdrop-1
  945 <username>      2   0  2064K   224K poll   100:24  0.00%  0.00% wbt
77261 <username>      2   0  4972K   304K poll    72:42  0.00%  0.00% shoutpsyx
48141 <username>      2   0  4736K  2444K select  68:04  0.00%  0.00% eggdrop-1 
56567 <username>      2   0  5292K   476K poll    63:58  0.00%  0.00% sc_serv  
  956 <username>      2   0 14068K  4660K poll    61:50  0.00%  0.00% ircd
17753 <username>      2   0  4500K   344K poll    54:50  0.00%  0.00% shoutpsyx
48327 <username>      2   0  4700K  2332K select  43:20  0.00%  0.00% eggdrop-1
48217 <username>      2   0  4720K  2004K select  39:56  0.00%  0.00% eggdrop-1 
41547 <username>      2   0  7508K  3980K select  31:50  0.00%  0.00% named
55890 <username>      2   0  4588K  2168K select  25:43  0.00%  0.00% eggdrop-1