My fourth effort on this reply (2 browser crashes and a power outage)...
You might consider the DFI AK75-TC at about $75-80 (KM133A chipset). Integrated audio & video (not great but work) but no LAN. OC using dip switches for 100/133 FSB and CPU multiplier to 12.5. A friend uses these boards to build value systems and I have a dozen mobos in the next room. Manual seems fine. Friend did some OC but the end-user wasn't interested so there wasn't much exploration. I don't have any review links handy but believe I found a couple when assisting with the initial selection.
Link:
http://www.dfi.com/
Another new board is the ECS K7S6A (SiS 745) which offers some OC features (dip switches for multiplier and Vcore in BIOS). I haven't seen any reviews. The ECS K7S5A (SiS 735) was a low-cost but reportedly solid performing mobo - a system for another friend is half-built so I have no personal experience here.
Link:
http://www.ecsusa.com/K7S6A.cfm
While I think it is worth investing a little extra in a motherboard (reliability worth more than a little extra performance) I also like to OC and do have budget limits.
HTH,
-PT