Beyond the multiple developer blogs already mentioned you can read the nearly 8 hours of Multiplayer Dev Q&A with both Zizaran and Steelmage that took place on September 14 and 15 which I’ve transcribed in the threads below:
If you’re interested to know basically everything the developers have ever said about trade you can read through this thread, but be sure to continue reading beyond the original post as there’s several updates posted within that provide additional information:
From all these dev blogs, streams, and elsewhere you can (thus far) expect the following in patch 0.9:
server authoritative multiplayer
performance improvements
combat feel improvements
some form of item transfer (trade)
cosmetic store (in a minimum viable state, or “beta state”)
updated story content & UI
new and/or reworked skills
updated skill VFX/SFX
update to ailments - both mechanical & performance changes
update to melee, bow, and throwing damage - mechanical change
new Unique items, enemies, NPC’s, armour, etc. – some of which are viewable in the aforementioned Dev Q&A - We’ve sprung a leak! thread
the usual bug fixes and balancing changes
and likely more that hasn’t been announced yet
As for when this patch is releasing, it doesn’t yet have a release date but the developers are currently aiming for sometime before year’s end, if possible. Though, as it nears closer to year’s end it could very well get pushed into next year but, regardless, a release date will be provided in a future development update when the developers are certain the date can be hit. That said, multiplayer is currently in closed alpha testing with those in the Community Tester Program.
For more developer responses about a possible multiplayer release timeline, the following are from recent developer streams. Firstly, when this question is brought up during the dev streams, EHG_Kain provides this answer in the comments:
In the dev stream on October 28th, this was asked and I’ve transcribed Mike’s response:
In the dev stream on November 4th, this was asked and I’ve transcribed Mike’s response: