Post your specific specs here.

MINE:
Processor: AMD Phenom II X3 720 Black Edition @ 3,1 GHz
Memory: Kingston HyperX-6400-2GB (800 MHz DDR2)
Motherboard: Gigabyte GA-MA785GM-US2H (AM2+ socket)
Videocard: ATI Radeon XFX HD4770 512MB
Screen: 15" Packard Bell TFT-screen (1024x768) I'd rather have a 21" (1680x1050 or 1920x1080)
OS: Windows XP Pro SP3
Mouse: Trust Predator
Keyboard: Logitech Cordless Internet Pro
Browser: Firefox!

Kind of like this:
AMD Phenom II X3 720 Black Edition @ 2,8 GHz
Corshair Memories..
Gigabyte Motherboard
ATI Radeon XFX HD4870 512MB

thats what i remember, but its a bad ass computer

Motherboard: ASUS Rampage II Extreme
Processor: Intel Core i7 Quad 2.67GHz
Video Card: NVIDIA GeForce GTX 285
Memory: 3x Corsair 2GB DDR3
Soundcard: Supreme FX X-Fi
Hard drives: 1000GB and Intel 80GB SSD
Power Supply: Corsair HX1000W

Case: Lian Li PC-A20
Monitor: Samsung SM 204B, ASUS 24 wide
Speakers: Genelec 8020A
Subwoofer: Genelec 5040A
Head Set: Sennheiser PC 350
Keyboard: Microsoft SideWinder X6, Logitech G15
Mouse: Microsoft Sidewinder, Logitech MX518
Mousepad: Razer Destructor

Nice, Tomppeli

I have a Dell Studio 1735 laptop, but I've modded it a bit.
CPU - Intel Core 2 Duo T8100 2.1GHz
RAM - 4GB DDR2 667MHz
SSD - Corsair P64 (64GB, Internal)
HDDs - WD 2500BEVS (250GB, Internal), WD 2500BEVS (250GB, External), Seagate 7200.11 750GB (External), Samsung HM080HI (80GB, External)
GPU - AMD Mobility Radeon HD3650 (17" Monitor)
Mobo - Dell PM965 chipset-based
Keyboard - Dell HW337 Backlit
Speakers - Logitech X-230
Headphones - Sennheiser HD201
OS - Windows 7 Ultimate x64
Steelseries mousepad, MS Basic Optical mouse (it does everything I need and is comfortable!)

Tomppeli wrote:Motherboard: ASUS Rampage II Extreme
Processor: Intel Core i7 Quad 2.67GHz
Video Card: NVIDIA GeForce GTX 285
Memory: 3x Corsair 2GB DDR3
Soundcard: Supreme FX X-Fi
Hard drives: 1000GB and Intel 80GB SSD
Power Supply: Corsair HX1000W

Case: Lian Li PC-A20
Monitor: Samsung SM 204B, ASUS 24 wide
Speakers: Genelec 8020A
Subwoofer: Genelec 5040A
Head Set: Sennheiser PC 350
Keyboard: Microsoft SideWinder X6, Logitech G15
Mouse: Microsoft Sidewinder, Logitech MX518
Mousepad: Razer Destructor

Nice Keyboard/mouse ! You seem to be a hardcore gamer... My mouse is a razer deathadder

I suppose I'll just copy off the specs listed on XFire!

Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 6000+, MMX, 3DNow (2 CPUs), ~3.0GHz
Memory: 2046MB RAM
Hard Drive: SAMSUNG SP2504C (250GB)
Video Card: ASUS ENGTX260 896MB
Monitor: Philips 190CW (19inch LCD WIDE MONITOR 190CW7)

I have a new machine too - bits and pieces put together but considering the budget cost it's pretty good, with 13,700 3DMark06 marks.

CPU - AMD Athlon II X2 245 2.9GHz OC'd to 3.63GHz (£48)
RAM - 2GB 1066MHz DDR3 OC'd to 1333MHz (£32)
GPU - AMD 4870 1GB with Akasa Vortexx Neo cooler (£74, second hand)
Case - Antec 300 with 2x Be Quiet! Silent Wings 120mm fans, 1x Zalman ZM-81 120mm side panel fan (£49 for case, £32 for fans)
Mobo - MSi 770-C45, overvolted (£46)
SSD - Corsair P64 SSD, TRIM support enabled (birthday present from housemates, they paid ~£160)
HDD - Seagate 7200.11 750GB (I won this in a TF2 competition at one of my uni's LAN events, but worth about £42)
PSU - Corsair CX400W (£39)
Monitor - AG Neovo 19" (is my housemate's monitor as he has a 32" Samsung LCD TV which he uses, so I'm just borrowing it)
Other - Dell DJ422 keyboard (£16), MS Basic Optical Mouse (£6), Steelseries medium mousepad (won this in a CS:S uni LAN tourney), Windows 7 Enterprise x64 (90 day TechNet trial, so I just reinstall and reactivate when it expires, so also free)

Total cost to me ~£342 (€390)

I like the case! My bro got the Nine Hundred.

Nick - didn't your mother tell you never to voltmod your mobo ? Nah seriously, that build looks very good - may one ask how much it cost you in the end?

XD she did but I couldn't resist!! It gave me another 150MHz on my CPU so I think it was worth it I'll update my last post with prices I paid (I'll give it in £GBP).

This was originally our fileserver for our uni house (no GPU, overclocks or SSD originally!), and we had about 8TB of HDDs attached. However, we filled them all so my 2 housemates bought most of the disks off me when I bought their shares of the system, and I upgraded and rebuilt it to be a gaming PC... so now we just transfer with FileZilla over our gigabit network

Your university does seem to be quite advanced, infrastructure-wise! You bought 8TB's of SSD-drives? You're kidding me, right? That must literally have cost you a fortune!

I'm considering putting an SSD in our server-computer - could you recommend any good sites with reasonable pricing? I can probably arrange shipping to Sweden even though the shop won't - so don't worry about that.

Yeah, it is pretty good and no no, 8TB of just normal hard drives, not SSDs! plus we all shared out the cost so it wasn't too bad.
An SSD does make a massive difference though for an OS - boot time on the SSD is about 20 seconds compared to 55+ on my hard drive with a cloned installation of Windows, and everything is so much faster and snappier, so it is a very good upgrade if you can get one.
I use http://www.scan.co.uk/ as my main site to buy PC hardware from, although http://www.aria.co.uk/ are also pretty damn good. If you do plan to put Server 2008 R2 on though, make sure you buy an SSD with TRIM support as it prevents performance degradation!!