Markus, James and me have come to the agreement it is best to delay the SMW 1.9 release till later in this year. Most changes are internal improvements, so the number of new features such a release would currently offer is not all to big. Doing this later will also allow us to continue making lots of changes without undermining the quality of the release.
If there is someone that really wants to see a release happen soonish and is willing to put some effort into it, things can of course still happen.
I put in a new preliminary target date on the roadmap: https://semantic-mediawiki.org/wiki/Roadmap
Jeroen De Dauwhttp://www.bn2vs.com
Don't panic. Don't be evil.