nVidia's nForce integrated chipset platform is about the only decent onboard video solution currently available due to the memory access model of this chipset. The 440 uses a 128-bit transfer model with dual-channel DDR memory. The Athlon only needs 64-bits, thus the extra 64-bits can be utilized for video memory transfers. Toss in 512 MB of system memory, and the nForce performs moderately well.
Otherwise, anyone interested in gaming should definitely avoid integrated video systems.