Filed under: LaptopsTired of waiting for Black Friday? Just plain terrified of getting mauled? If you happen to fit into either of the aforementioned categories, take heart, as Dell's got you covered. The firm's 15.4-inch Vostro 1000 -- which was listed earlier this year for as low as $449 -- has now dipped $50 lower to crack the oh-so-crucial $400 barrier. The all-black lappie features a 1.7GHz AMD Athlon 64 X2 TK-53 processor, Windows XP Home Edition, an XGA panel, 120GB 5,400