1.8 is coming fast like a train, the first Release Candidate is carrying a load of bug fixes and some changes which were really needed to make the game working more consistently (for example now the terrain variety is taken into account when regenerating the map), some more fixes regard the newgrf random triggers for the industries, others are just graphic.
The text in industries window has been reworded to make it more comprehensible when stockpiling is enabled.
Finally AI companies should be able to continue their business even when low on budget but high profitable, as some of them like to live on the edge of the bankruptcy, now the check for bankruptcy is performed before subtracting the recurring monthly costs.
The last but not least important wagon brings some features too, maybe not so big but always welcome: closing windows with right click, tile-wide separators to measure train lengths in depot GUI and other nice things which you could check in the [changelog]