Playtest and demo have been updated with a major update:
Two new alien ship types, a fast courier and a medium-sized all-purpose ship.
New trade goods
Lots of bugfixes and balance updates to the economy, this should make prices in general less "flat" and provide more trade opportunities.
More trade information in the UI such as where to find certain resources.
Trade good interdependencies - tech goods now require specific resources as input, which can trigger temporary shortages and other interesting trade chances.
lots of bugfixes.
In short: This update should make the game actually playable, not just testable. :-)