JUST FOR YOU ALL, I spent the past 2 evenings figuring out the recipe. 
Blackberry Mojitos
15 fresh mint leaves
¼ cup fresh lime juice
2 ½ tablespoons granulated sugar (may need more, depending
on the sweetness of your berries)
¼ cup white rum
½ cup fresh blackberries
cold seltzer or soda water
In a small pitcher, muddle the mint leaves, fresh lime juice, and sugar until the sugar is dissolved. Allow to sit at room temperature for 10-30 minutes.
Use a slotted spoon and pick up most of the mint leaves then use a second spoon to squeeze the leaves almost dry of liquid. Discard the mint.
Add the rum and blackberries. Mash the berries lightly; stir.
Fill 2 (12-14 ounce) glasses with ice and divide the rum mixture between. Fill with seltzer. Stir gently.
Jack thinks that it needs more rum, but with this heat I have a hard enough time making dinner... enjoy!
BTW I took a nice photo of it but am having some computer issues, so if you want to view the picture I did manage to get it into a blog post today.

Blackberry Mojitos
15 fresh mint leaves
¼ cup fresh lime juice
2 ½ tablespoons granulated sugar (may need more, depending
on the sweetness of your berries)
¼ cup white rum
½ cup fresh blackberries
cold seltzer or soda water
In a small pitcher, muddle the mint leaves, fresh lime juice, and sugar until the sugar is dissolved. Allow to sit at room temperature for 10-30 minutes.
Use a slotted spoon and pick up most of the mint leaves then use a second spoon to squeeze the leaves almost dry of liquid. Discard the mint.
Add the rum and blackberries. Mash the berries lightly; stir.
Fill 2 (12-14 ounce) glasses with ice and divide the rum mixture between. Fill with seltzer. Stir gently.
Jack thinks that it needs more rum, but with this heat I have a hard enough time making dinner... enjoy!
BTW I took a nice photo of it but am having some computer issues, so if you want to view the picture I did manage to get it into a blog post today.