Checkout the Aopen MX3S MB ... I've used quite a few and it overclocks OK ... you can tweak the bus speed and voltage ... takes FCPGA chips. Has onboard video, sound and Intel LAN. I just bought some for about $134 at AXIONTECH.COM ... MYAOPEN.COM has them too.
We use them mostly with the Celeron 600 for folks that are not into heavy video stuff ... business type apps it does just great, especially when you're moving up from a Pentium 90 with 32MB RAM.
Some of the specs (snip, snip):
Model: MX3S
Form Factor: Micro ATX
Memory Slots: DIMM x 2
Chipsets: Intel 815E(+ICH2) Chipset
CPU Bus Clock
Spec:133
Max: 166
Notes: AC'97 Audio, LAN and VGA onboard
ATA-100 / PC133 / 4X AGP
Key Features Support 66/100/133 MHz FSB for Intel Celeron & Pentium III Socket 370 CPU
Support PC133 SDRAM DIMM
Jumper-less Design
CPU clock ratio from 1.5X to 12.0X
Integrated 2D/3D Graphics Engine with Dynamic Video Memory Technology
- Integrated 24-bit 230Mhz RAMDAC
- Integrated H/W Motion Compensation Engine
And, One AGP Slot for 4X/2X/1X AGP Graphic Card Upgrade
Optional 4MB AIMM Display Cache Upgrade for Integrated VGA through AGP Slot
AC'97 2.1 Audio support / Audio Codec onboard
Intel 10/100Mb Fast Ethernet onboard
4 Channel USB Ports Ready
Support Ultra DMA/100 HDD(Additional Ultra DMA/100 Cable included)
Hardware Monitoring
Wake On LAN / Timer / Keyboard / Mouse / Modem
PCI Rev 2.2 Compliant
Resetable Fuse Providing Short Circuit Protection for Keyboard and USB Device
AC Power On Auto Recovery
Microsoft PC99 Logo
ACPI S3(Suspend to RAM) & S4(Suspend to Disk) support
Year 2000 Compliant
AOpen Bonus Pack CD (Norton Anti-Virus included)
Architecture: 3 PCI slots +1 AGP slot
Max. Main Memory: Max. 512MB SDRAM ( PC-100 or PC-133 ) for 168pin DIMM*2
DIMM Type: 8/16/32/64/128/256 MB
On Board VGA:
Integrated 2D/3D Graphic Engine:
-2D Resolutions & Colors(Max Refresh Rates)
640x480 256/65K/16.7M Colors(85/85/85Hz)
800x600 256/65K/16.7M Colors(85/85/85Hz)
1024x768 256/65K/16.7M Colors(85/85/85Hz)
1280x1024 256/65K/16.7M Colors(85/85/85Hz)
1600x1200 256 colors(85Hz)
On Board Sound: Analog Devices AD1885 AC?97 CODEC onboard
On Board LAN: ICH2 Integrated MAC+ Intel 82562ET/EM PHY onboard for 10/100Mbps Ethernet
BIOS: Award Plug and Play 4MB Flash ROM BIOS
On Board I/O:
1 Serial Ports (UART 16C550 Support)/ 1 Optional Serial Port via additional COM2 cable
1 Parallel Port (SPP/EPP/ECP Support)
2 Channel E-IDE (Mode 4 and Bus master Ultra DMA 33/66/100 Support)
1 Floppy Drive Connector (1.2/1.44/2.88MB)
2 Channel Universal Serial Bus Ports
1 PS/2 Mouse Port
1 PS/2 Keyboard Port
Game/Midi Port ,Speaker-Out ,Line-In , Mic-In,
Onboard Connector:
CD-Audio, Aux-In, IrDA , Wake-On-Lan , CPU Fan, Chassis Fan,GPIOx2
Additional 2 Channel USB Ports (via additional cable)
Battery: 3V Lithium Battery
Green Function: Yes
Board Size: 220mm x 244mm, Micro ATX Form Factor