Macbook Pro freezes / locks up...

I need help. My Macbook Pro 17" locks up without warning, usually while I am running a number of programs. Here's some of the info on the actual computer hardware, running Mac OS X 10.6.6

Model Name: MacBook Pro
Model Identifier: MacBookPro1,2
Processor Name: Intel Core Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 2 MB
Memory: 2 GB
Bus Speed: 667 MHz

This has been an ongoing problem for a very long time, probably back to 10.5.5ish. The mouse stops moving without warning, though if I am playing music via itunes, or from the web, to my speakers connected to my airport express, the music continues to play. Otherwise, I lose complete control over saving anything I was working on, other than simply being able to see clearly everything on the screen / for eg, no blue screen, dark screen, nothing - just frozen in a standstill.

Using Console, I was able to find the messages to pinpoint what looks to be the problem, but does anyone have an idea of what steps I can take to keep this from continuing to happen?

1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5339
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5340
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5341
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5342
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5343
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5344
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5345
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5346
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5347
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5348
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5349
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5350
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5351
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5352
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5353
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5354
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5355
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5356
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5357
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5358
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5359
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5360
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5361
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5362
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5363
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5364
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5365
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5366
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5367
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5368
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5369
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] 5370
1/7/11 10:38:18 PM [0x0-0x3ed3ed].com.apple.iTunes[2310] *** process 2310 exceeded 500 log message per second limit - remaining messages this second discarded ***
1/7/11 10:38:53 PM com.apple.usbmuxd[2308] stopping.
1/7/11 10:38:53 PM com.apple.usbmuxd[2317] usbmuxd-207 built for iTunesTenOne on Oct 19 2010 at 13:50:35, running 32 bit
1/7/11 10:43:38 PM mDNSResponder[18] PenaltyTimeForServer: PenaltyTime negative -27197, (server penaltyTime 1948411873, timenow 1948439070) resetting the penalty
1/7/11 11:05:01 PM kernel npvhash=4095
1/7/11 10:58:38 PM mDNSResponder[18] PenaltyTimeForServer: PenaltyTime negative -158530, (server penaltyTime 1949180547, timenow 1949339077) resetting the penalty
1/7/11 11:05:01 PM kernel PAE enabled
1/7/11 11:05:01 PM kernel Darwin Kernel Version 10.6.0: Wed Nov 10 18:13:17 PST 2010; root:xnu-1504.9.26~3/RELEASE_I386
1/7/11 11:05:01 PM kernel vm_page_bootstrap: 508561 free pages and 15727 wired pages
1/7/11 11:05:01 PM kernel standard timeslicing quantum is 10000 us[/B][/B][/B]

Can someone help solve this. It looks like it may be something to do with iTunes, but I have no idea what to do. Thanks!