I like the new site; looks very good, and seems to guide me to interesting places nicely.

A few nitpicks though:

• Many of the reference sections have URLs that aren't links.
• The summary is fairly hidden: it's 2 clicks from the front page (Get Started -> research summary). If this is meant to be a bit of an introduction, it might be nice to be more obvious. The "Recommend readings" section could be better formatted, so that the text is more obviously separated from the references. (And, the in-text citations aren't hyperlinks.)
• The keep up with the latest developments here box on the front page should be have some indication that it is an email field.
• Having an "Up" link, or some sort of breadcrumbs would be nice: gives the user a sense of position, which is especially important for someone entering via a search engine, or external link to a deep page. (Especially from each tech summary up to the tech summary intro, since these are pages that people are relatively likely to link to/find via a search engine.)
• The Media and updates looks a little bit like a blog archive with some external coverage mixed in: it might be nice if internal and external links were more distinct. (Not sure the best way to do this: maybe entirely separate sections, or just within each month. Maybe even just have the external links bolded, or marked by a little icon.) (And also, not a big problem at all, but the blog links are inconsistent: some point to singinst.org/blog/..., some to singularity.org/....)

And some broken links/HTML:

• "What is the Singularity?" link on Our Mission has eaten extra HTML and so 404's (it's actually completely hiding the link to the FAQ.)
• "Complex Value Systems are Required to Realize Valuable Futures" link on the Research page
• The summary appears to have had some encoding issues (or something): ?? throughout the page.
• The whole of Get Involved is a link to Opportunities.

(Some of these might be browser specific bugs: I'm using Firefox nightly on linux.)