ChrisF has posted this same question on the meta of all the other sites undergoing elections. He doesn't have a Seasoned Advice account, though, so with his blessing I'm posting this here for everyone to use.
Yi Jiang has put together a nice site that use the Stack Overflow API to display information on the moderator candidates.
The information presented is:
What the candidate wrote when nominating themselves.
- Answers/Questions on the main site and it's meta
- Up-vote/down-vote ratio
- Average reputation earned per post
- Average reputation earned per day.
- Participation in other Stack Exchange sites.
It displays what Yi Jiang considers to be noteworthy badges and whether the nominee has the badge and a summary of their recent activity.
The information is presented as is with no commentary.
It came about from this question on MSO Moderator nomination possibly useful statistics