Cryptic Studios has published an FAQ on the official Star Trek Online website.
What is Star Trek Online?
Star Trek® Online is a massively multiplayer online role-playing game set in the Star Trek universe. Star Trek Online will be developed for both console and PC formats. Game features will include customizable ships and characters from the Klingon Empire and United Federation of Planets, ground, space and shipboard gameplay and unique options for player-generated content.
What is Cryptic using from the previous development?
Star Trek Online is entirely based on Cryptic's design and built entirely using Cryptic Studios' technology and assets. The former studio that we acquired the Star Trek game rights from had a huge amount of concept art created for their game – much of that is applicable, and we are taking advantage of it. But Cryptic's engine, technology platform and content pipelines have become so mature that with a small team we can quickly ramp up a project.
Will there be PvP?
Yes. We plan for a faction vs. faction PvP ruleset, but there are also plans for a competitive PvE mechanic.
Will there be PvP, PvE and RP rule set servers?
There will not be separate servers. Open PvP will be restricted to designated sectors of space (far-off reaches of unclaimed territory). Consensual PvP and competitive PvE will occur between the realm borders (the Neutral Zone), where players will be competing over territory and resources with the option to PvP.
Will there be an economy?
Many of the details are still in the works, but yes, there will be an economy that makes sense in the Star Trek universe. Since the Federation has explicitly done away with money, expect bartering and trading of goods to be an important part of the economy. Less tangible forms of economics such as Reputation are also not out of the question.
Three new screenshots can be seen here as well.