But what are you looking for? You have literally thousands of combos that you can pull off with UW.
Ghostway + any sweep effect is a ton of fun.
Blue and white are typically the best colors for blink combos. Ie Mistmeadow Witch + anything with a comes into play effect. One of my favorites being Mistmeadow Witch + Mnemonic Wall + Time Stretch for infinite turns (or any other instant / sorcery for repeated use).