Hi everyone,
Here's a breakdown of the revisions left to review: http://www.mediawiki.org/wiki/MediaWiki_roadmap/1.17/Revision_report
Current count of branches plus extensions: 283
There's a script to generate this (publishing source later; requires toolserver), so we should be able to maintain this list up until release. The main goal right now is to give us better visibility into the revisions that don't have reviewer tags on them, since that's hard to see otherwise.
Rob