In Chinese medicine, melon has cooling energy. But be careful: while refreshing, it’s best not to have melon with breakfast as it is too cold for a morning stomach just heating up to digest food all day. Save melon for later in the day.
And I agree with Smitten Kitchen: leave out the sugar. Melon is plenty sweet on its own. If you do need more sweetener, I recommend agave nectar, a sweet, honey-like product of the agave cactus (tequila!), which has a low glycemic index so it’s gentler to the system.
Head over to Smitten Kitchen for the recipe and more info.
Found this tidbit via StumbleUpon.
EDIT: Before I could get this piece up on the intarwebz, Lifehacker beat me to it. But I still found it first! Ha!