Joe mentioned a few statistical ways to pick the All-Star teams, so here are some NL numbers based on Hardball Times' win shares and runs created stats (with voted NL starter in parentheses). Win share leaders are shown first, followed by runs created.
C - McCann/Soto; Martin (Soto)
1B - Berkman; Berkman (Berkman)
2B - Uggla; Utley (Utley)
3B - Jones; Jones (Jones)
SS - Guzman/Ramirez; Ramirez (Ramirez)
OF - McLouth/Beltran/Bay; Burrell/Bay/McLouth
The NL reserves at catcher are McCann and Martin, so all 3 stat leaders made the squad. Berkman was an easy pick as the starter; Pujols and Gonzales were selected as reserves. Uggla and Guzman were picked as reserves up the middle along with Tejada. Aramis Ramirez is the reserve 3B. The OF sees Holliday, Ludwick and McLouth join the team.
McLouth should be there, but probably with Burrell, Beltran, Hart and Bay. Reyes should get the nod over Tejada at SS. Pujols and Gonzales are OK at 1B. Wright probably gets a slight edge over Ramirez at 3B.