Repeated kernel panics...help?

Hey everyone, I am new to macs and I was wondering if any mac-tech-savvy individuals could help me out. Here is my situation.

I bought my 2.4 alum macbook last Wed. I took it home and Friday it crashed from a "kernel panic" while I was only listening to iTunes. I took it into the apple store and they replaced it for me no questions asked.

Now that was saturday, monday it crashed again in the same way, only this time I was using Safari only. I called the tech support and the guy basically told me it was probably my fault, and to call back if it happens again.

Thankfully it hasn't but I definitely want to prevent it from happening again. So here is what I have on here that may be "causing" it.

I moved from a PC, and all I have moved are documents, music and pictures. I have it set up with a time capsule I bought a few months ago (my wife uses it also with her PC). I also use my old Dell PC mouse sometimes. Now I know the second time I was using that when it crashed, but the first time I can't remember (could this possibly be causing it somehow??? the tech guy seemed unsettled that I wasn't using a APPLE mouse)

Below is my panic log (which someone told me to look at). Someone help me solve this mystery! I thought Macs weren't supposed to crash!!!

Mon Oct 20 16:52:34 2008
panic(cpu 0 caller 0x001A9C5C): Kernel trap at 0x302e686c, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x067ac000, CR3: 0x0186a000, CR4: 0x00000660
EAX: 0x00000000, EBX: 0x01081a1f, ECX: 0x067ac000, EDX: 0x000007a8
CR2: 0x067ac000, EBP: 0x2febb5d8, ESI: 0x000018f6, EDI: 0x067ab0b0
EFL: 0x00010287, EIP: 0x302e686c, CS: 0x00000008, DS: 0x067a0010
Error code: 0x00000000

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x2febb3e8 : 0x12b4c9 (0x45aaac 0x2febb41c 0x1335ba 0x0)
0x2febb438 : 0x1a9c5c (0x464070 0x302e686c 0xe 0x463820)
0x2febb518 : 0x1a026d (0x2febb530 0x2febb64c 0x2febb5d8 0x302e686c)
0x2febb528 : 0x302e686c (0xe 0x48 0x10 0x302d0010)
0x2febb5d8 : 0x302e384b (0x67ab09c 0x2c0e3736 0xe 0xe8e2)
0x2febb698 : 0x302df742 (0x2febb6ec 0x2febb6f0 0x2febb6f4 0x2febb6e4)
0x2febb718 : 0x215b07 (0x0 0x4952804 0x2 0x2febb77c)
0x2febb798 : 0x227db6 (0x4952804 0x2 0x2c0e3700 0x44c3430)
0x2febb7c8 : 0x241912 (0x4952804 0x2 0x2c0e3700 0x44c3430)
0x2febb918 : 0x2484db (0x2c0e3700 0x1 0x0 0x4498208)
0x2febb968 : 0x249cca (0x1 0x0 0x0 0x38a28a)
0x2febba98 : 0x247ecc (0x4498270 0x0 0x8000 0xc301000a)
0x2febbc78 : 0x23bb2f (0x2c026400 0x14 0x0 0x2bf4f8f4)
0x2febbcb8 : 0x23d8b1 (0x2c026400 0x14 0x6 0x0)
0x2febbdd8 : 0x23d8ed (0x2c026400 0x0 0x2febbe68 0x26c7e9)
0x2febbdf8 : 0x2298a8 (0x2 0x2c026400 0x2febbe48 0x14216e)
Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.cisco.nke.ipsec(2.0.1)@0x302dd000->0x3034bfff

BSD process name corresponding to current thread: kernel_task

Mac OS version:
9F2114

Kernel version:
Darwin Kernel Version 9.5.1: Fri Sep 19 16:19:24 PDT 2008; root:xnu-1228.8.30~1/RELEASE_I386
System model name: MacBook5,1 (Mac-F42D89C8)