This post in their forums announces the new site and their intentions, while the roadmap at the bottom of their wiki reveals a bit more about what's to come.
Individual script pages look good in this new format, with a clear description column and a sidebar containing all the pertinent metadata and tags. A big black "Install this script" button replaces the old, hard-to-find HTML link of the previous design, and I particularly like the link at the bottom of the content column to contributors who helped out with the script.
All things considered, I think this is a successful redesign that should bring the site more credibility and attention from both Greasemonkey script writers and users. I'll be interested to see how those new features roll into the site in the coming weeks and months.