Dell is planning to launch four new laptop in their Latitude series, the D531, D631, D630 and 830. The 14.1-/15.4-inch D531 and 14.1-inch D631 are based on the latest AMD M690T chipset, and dual core AMD Turion 64 X2 processor. They offer ATI Radeon X1270 graphics card, HDD/ SSD/ HHD, 1280 x 800 resolution, up to 4GB RAM, DVD combo, Ethernet, Bluetooth, and Wi-Fi. The 15.4-inch D830 is a business laptop with 1920×1200 resolutions, Core 2 Duo processor, 4GB RAM, Intel GMA 3100 graphics / dedicated NVIDIA Quadro card, and same remaining specs. The 14.1-inch D630 is a Santa Rosa laptop with same specs as that of D631.

All the laptops are pre-installed with Vista. No word on pricing and availability.

Source [D531/D631]
Source [D830]
Source [D630]