Dell dropped the price of this, which may help someone looking for a 6400 deal. Lead time is 2 weeks.
Remember to use Quidco for cashback too.
307-N1164006 (Home) - £399.01 delivered
Intel® Pentium® Dual-Core T2080 Processor (1.73GHz,533MHz,1MB L2 cache)
Genuine Windows Vista® Home Premium - English
1 Year Base Warranty - Collect & Return
No Accidental Damage Support
15.4" Wide Screen WXGA (1280 x 800) Display with TrueLife
1024MB 667MHz Dual Channel DDR2 SDRAM [2x512]
120GB (5400rpm) SATA Hard Drive
Intel® Media Accelerator 950 Graphics Up to 256MB shared graphics memory
Fixed Internal 8X DVD+/-RW Drive including software
6 cell Lithium-Ion Battery (53 Whr)
56.6k V.92 Capable Internal Modem & Adapter - UK
Dell Wireless 1390 802.11b/g Mini-PCI Card (for Dual-Core Processors)