Chowhound, the esteemed foodie restaurant-themed message board, also has a Home Cooking board. This morning their Home Cooking digest blog posted a roundup of a thread about the uses for fresh oregano:

Fresh oregano is a must for many Greek recipes, say hounds. bite bite sprinkles chopped oregano and red pepper flakes over feta and drizzles it with olive oil. tzurriz is a fan of this Greek-style tilapia. “I’ve made it three times in the last two weeks,” he says. “It is delicious! Seriously.”
Others say the herb is a great flavoring for grilled dishes.

[Link to the whole article].