The "yam" they're referring to is a Filipino variety that turns the ice cream a strange shade of lavender. However, it tastes really good.
I have some savory ice creams served with main dishes. (That caviar one looked like it could be interesting) but I really don't like the cold and texture with my meat or fish. Kinda weird combo in the mouth.
Most of those in the link sounded just gross, tho.