Actually, I currently have Geil Golden Dragon Dual 2x256 PC3500 CAS 2-3-3-6 (stock), running at CAS 2-3-3-7 210fsb 2.8V.
For some reason now I randomly have instability issues when I run it in dual channel, so I have them running in single. They are on an ASUS A7N8X-DEL rev2.0 w/2500barton @ 210x11 @ 1.79V.
I payed 129bucks for these (late spring '03)/(early summer '03), and am not too happy with it. I have them now running at 200fsb 2-4-4-8 @ 2.7V