Squarespace 6

If you are ready to build websites in an environment that facilitates the creation of beautiful and manageable interfaces, than you should check out Squarespace 6. The speed and ease of use are like nothing else out there.

This beta version will launch with a full set of portfolio templates.  The most integral components, including galleries, blogs, page builders, and widgets(blocks) have been optimized for ease of use. The variety of styles available within the portfolio templates are diverse.

A convenient FAQ, that should answer many if not all of your question, is currently available.  This new platform is a first for Squarespace. Compared to their previous version, you will now be able to build new templates much faster than before.