Here's mine
Five year old CPU (P4 Northwood, 3.4GHz HT) in a six year old motherboard (Acer MSI MS-6763). CPU & memory scores pretty sketchy, but WEI is all relative. OS & apps see 3.3 GB useable RAM. This system flies.
Note that I have Eve Online Quantum Rise running in the background (was not running during actual WEI test), 1680x1050x32, all the Eve eye candy turned on. Hyperthreading really comes into its own, here, and in most other tasks. Very quick & smooth.
This system also runs Microsoft WorldWide Telescope v.2.2.41.1 without a hitch. imho, Windows 7 = best of Vista & best of XP, rolled into one. Quite possibly the best OS I've ever run on a home PC, and being the good beta tester that I am, I've been providing Microsoft with constant feedback to that effect, running various old/new apps (and no, I'm not a paid shill for Microsoft - I'm an unpaid one

). I may hang onto this PC for a couple more years.
I also note that many of you peeps with your latest/greatest i7s & dual Quads are running the 32 bit version of Win7, which, for the life of me I can't understand, given that your CPUs are 64 bit, and that MS made the 64 bit version of Windows 7 available the same time they did the 32 bit version.
System: (archaic) Acer Veriton 7600G (AGP 8X model)
OS: Microsoft Windows 7 Build 7000
CPU: Intel Pentium 4 3.4 GHz Northwood HTT
Motherboard: Acer/MSI MS-6763 (proprietary), 865G/PE chipset
Memory: 4 GB SuperTalent PC3200 DDR, dual channel, FSB 800 MHz
Video: ATI Radeon 3850HD, 512 MB GDDR3, AGP 8X (DirectX 10.1 & 11(?)
Drives: 2 x Seagate Barracuda 500 GB 7200.11 SATA2 @SATA-150, NCQ, (not treated to bricking firmware)
PSU: Antec 650W EarthWatts
Monitor: Hewlett-Packard W2207 22" LCD flat screen, DVI-D
"We don't need your new hardware. What we need is new software. Let this innocent
little PC live out its life!"