It will be another day or two before we will start, at least.
Do notice that if you are planning to design a race with maintenance reduction, that the scale now works differently. It's now actually what it says it is, proportional rather than additive. That is, in unmodded SE4 or Proportions 1.4.2 or less, 25% is the base, and buying 10% maintenance reduction will give you a 15% maintenance cost compared to ship cost. In Proportions 1.5, 26% is the base, and buying 10% maintenance reduction will cost far less and have less effect, giving you 26% x 90/100 = 23.4% maintenace costs. (It can be raised to higher levels. 50% will give you 13% base costs etc.)
The SE4 Image Neo-Standard isn't a ship set you would download - it's a standard for other mods and shipsets to use, so that they are compatible. It says what file names to use for what sorts of new ship types. So, if you use a ship set made for this standard, its special images like Scout, Infantry, Heavy Base Ship, etc., will get used in Proportions 1.5. See
http://www.sandman43.fsnet.co.uk/neostandlist.htm for a partial list of ship sets that have these.
True about solar sails - though they work better than trying to make a sail-only ship in unmodded. Just put something with supplies on your sail ship and it'll fly. I'll adjust this for 1.6.
PvK