The latest blog covers the Spacing Guild and their characters. I suspect these will be less coveted than the Fremen or Bene Gesserit, but they could well fill the same niche as the smuggler with their contacts.
Not sure how many will play a Financial Advisor but given in my last game an accountant did beat two House guards to death with a Profit & Loss ledger (after being suitably dosed up by the players) anything is possible.