I could re-write what I wrote earlier, but it still seems relevant so I'll just repost it. The guy is an iconic player on arguibly the best team of the decade. If he plays another 10 years I think he will have the universal respect that will get him in. In his case, the subjectivity of the voting should play in his favor.
Phil Rizzuto got in with .273/.351/.355/.706 career, 1588 H, 38 HR, 239 2B. Pedroia is at .300/.370/.451/.822, 59 HR, 180 2B and should have a great shot. Pedroia's defense is exceptional and very consistent. Given their roles on their respective teams I think Rizzuto is a decent comp.
Rizzuto had a total of 3 seasons with an OPS+ above 100 (i.e., better than league average regardless of position). He averaged 201 TB per 162 games.
Pedroia has 5 seasons above OPS+ 100, and averages 288 TB per 162 games.
I realize there is a difference between SS and 2B it isn't so significant that Pedroia's numbers don't stack up, especially if the Sox manage to win a few more WS in his career.