2.7.1 is out, improving upon a solid 2.7 release.
The next version of the iPhone app is almost out and features comment moderation.
2.8 is well underway. So far there have been lots of script loading and DB performance improvements. The first cut of the theme installer is in, and the redesign of the Widgets admin UI is beginning. Custom tag taxonomies now have some built-in admin UI, and proper timezone and DST support is available if you are running PHP 5.