My system is running halfway decent now!
I've had everything working (video, audio, wifi, etc), but I was getting kernel panic errors right and left. I had tried updating to 10.5.6, even installed 3.52 firmware and nothing seem to work. So, I had given up on osx for awhile. Until today! I just turned off my wifi, used my regular ethernet connection and my system is running much more stable?
I'm running multiple torrents, misc. apps and even installed Adobe CS4 Master collection without any problems. Before it would crash from simply browsing the web.. lol