Oh, a corollary to 'any-order PC posting' - you can always change your decision about your actions based on what other PCs are doing that turn (provided I haven't done my next DM NPC turn post) - just be aware you might create a 'loop' with the other PC if they do the same thing (OOC shoutouts might be handy.) It's no advantage vs tabletop where players converse in real time and coordinate (and the PCs can do so in-character via out of turn talking).