Getting a Boost from Jetpack
The developers at WordPress.com have been busy updating their multi-purpose Jetpack plugin with all kinds of neato stuff. Versions 1.8 and 1.9 came and went, and no sooner version 2.0 is out. This version is loaded.
Publicize, post by email, infinite scroll, and the Photon CDN headline the 2.0 feature set. There are some cautions though. Infinite scroll needs a compatible theme, and I need to look into Photon a bit more to understand its ramifications.
Overall though some solid features.