BIOS Options
You can see that the motherboard has a lot of options for the overclocker, including very fine voltage and bus settings for CPU, PCI and memory. There are also options for enabling quiet fan control, which is particularily important for an office environment, but not so much for an overclocker who needs as much cooling as possible anyway.
The frequency/voltage control page is pretty much a one-stop place for nearly all your tweaks. Here you can change the CPU, AGP, PCI and Memory frequencies/voltages. To summarize:
CPU Bus: 100 - 400 mhz, 1 mhz increments
AGP Bus: 66.67 - 100 mhz, 0.66 mhz increments
PCI Bus: 33.33 - 49.34 mhz, 0.33 mhz increments
DDR Bus: 1.33 - 2, 0.33 increments
CPU Voltage: 1.4 - 1.8v, 0.025 v increments
AGP Voltage: 1.5 - 1.876v, 0.025 increments
DDR Voltage: 2.4 - 2.85v, 0.025v increments
Overclocking
Expect to be somewhat limited. The onboard Intel Extreme graphics holds the system back a bit and limits its overclock compared to other 865 boards. However, it gives enough options for the first timer who wants to play around with the options. As stated before, however, this is still targeted at the lower end, not at the high end.