Each release has a changelog page.
You can find the very latest beta release here (r113 at the time of writing this post)
Slide down to the very bottom of (almost) any page of the site and you can also find the link there.
And the list of all available/past releases is here
As for the roadmap, check out Scirra's blog
. The last posts about it dates from last year/early 2012 though, and everything that was planned has been reached/implemented and even further.Kyatric2012-12-19 10:04:20