When BioWare introduced us to the system a long while back, only eight crew skills were revealed. However, on Friday, the Community Team gave us a stealth update to the Crew Skills page, revealing all the categories. For example, Archaeology is now listed under gathering skills. Crafting skills will apparently grant players Armstech, Cybertech, and Synthweaving. And finally, we will be able to send our companions on Investigation and Underworld Trading missions.
The Star Wars: The Old Republic Crew Skills page has all the latest information; check that out, then watch Massively next weekend for all the TOR PAX information.