They make computers. Don't be silly. They're called Macintosh, perhaps you've heard?
nothing is "special" about them.
Dual-core 2.3GHz PowerPC G5 processor(does Apple make this processor?)
1.15GHz frontside bus per processor
1MB L2 cache per core(sounds similar to the Athlon X2's)
512MB of 533MHz DDR2 SDRAM (PC2-4200)(only 512MB of ram? does Apple make this ram?)
250GB Serial ATA hard drive(Same as a PC hard drive WD, seagate Maxtor or someone else)
16x SuperDrive (double-layer)(made by who sony,plextor, NEC, Hitichi or Lite-on?)
Three open PCI-Express expansion slots(so what PC's have that also)
NVIDIA GeForce 6600 with 256MB GDDR SDRAM(Made by who? gainward, leadtech, or BFG?)
Apple buys hardware rebrands it as Apple and puts it in a "cool" package. Again they could keep up this marketing strategy even if they move in to the PC market. Are they afraid of losing their 2% market share?