There are really damaging things -- although nothing surprising and that's why I think nobody is talking about it. E.g. in one email HRC talks about how Qatar is funding ISIS, and in the next they're giving Bill Clinton a $1m check for his birthday. The wallstreet stuff would've definitely tilted the balance to Bernie Sanders in the primaries. Finally, the level of involvement with the press is far more than I could've ever imagined (the NYT is sending the HRC campaigns drafts of stories for approval before they come out, and promise complete support).
I found this site which summarizes the finding (tweeted by a Trump supporter): http://www.vaskal.ca/podestafiles