It's a big help. You can look at PCI/AGP dividers, voltages (Vcore, DRAM, AGP), multiplier, FSB, command rate/driving strengths...all the most critical overclocking attributes all on one page. This way you don't have to go between different menu pages to reference other specs before you decide on a new config. When you're tweaking all the time it makes things a lot easier.
ABit was the first to have this. Asus tends to make very feature-rich boards with even more options in BIOS, but in my experiences (A7M266 vs. ABit KG7) they don't hit as high FSB speeds. I've had great experiences with the Epox 8KHA+ and FSB rates (KT266A is still the best chipset for memory bandwidth per mhz, if only it had a 1/5 divider) but the ABit KR7A is still the KT266A board I prefer over it because of the BIOS softmenu. Epox also tends to come out with products the latest, but I've found their products to not justify the extra wait. This is why I prefer ABit above all others. Personal experiences of mine, but offered for your consideration.