The Shushan Channel offers to raise the bar on Purim by providing original, topical and hilarious Purim shpiels created by top comedy writers from New York and LA. These shpiels can be used by synagogues, Hillels or JCCs and are guaranteed to make people laugh.
From the website you can look at sample sketches and read reviews from congregations who have used The Shushan Channel in the past. I watched the sample sketches and they are pretty funny, but even with a good script it is still critical to have good delivery and comic timing. Most Purim shpiels are so bad, however, that at least with some professional comedy writers there is bound to be an improvement.