I cannot understand why you all keep talking about these machines instead of just going out and buying one? Just get one and I will sincerely be happy for you. As I stated many times, I have a PC. It's great, and I have nothing against them. Don't know why people keep talking about these mystical laptops on MR though. They are completely different machines and aimed at people with different needs. MR members will not put sufficient pressure on Apple to lower their prices. They will do their standard lowering of prices after rev A, but don't expect a $500 MBP anytime soon, or ever. PC's are a tremendous value if you don't think what Apple brings is worth the money. In the meantime, I will enjoy the launch of this Pro add-on device.
Edit: You have inspired me to just add my PC to my signature.