Sapphire Technology has built an ATI Radeon X850 XT PE card that uses liquid metal to cool the GPU and memory. Called the Blizzard, the card is quieter than a standard water-cooled system and apparently actually conducts heat by bathing the heatsinks in soothing liquid alloy.
The website claims 65X more heat conductivity when compared to water cooled systems but we beg of you—do not open and drink the sweet liquid metal inside. It can only end in tears.
Product Page [Sapphire via ExtremeTech]