Don't know about you, guys, but I find their website completely unappealing and off-putting. The actual technical stuff is quite interesting, but their use of consumer-style marketing techniques does an excellent job of killing any desire to learn about it. Trademarked buzzwords, a video of CEO discussing "key values", a "blog" that reads like a marketing presentation, etc. It's clear that they are trying to target suits rather than developers, and that's quite unfortunate.
I agree with your assessment of their website, but the paper itself looks really interesting. The author also mentions a paper that he liked from the same conference:
"PS: I would also like to mention another deserving paper
from PLDI 1998: 'Optimizing direct-threaded code by
selective inlining,' by Ian Piumarta and Fabio Riccardi.
This paper describes the technology that was later used
in QEMU, and it qualifies in my opinion as one of the
greatest hacks of all time."
It's easy: show me the code. Links to quick examples and tutorials that show me what and how this language can do are amazingly useful. Pretty much you want the primary focus to be on using your language, not selling it. You have a navbar across the top; at first glance I know for 100% certainty only what two of those links will do for me ("home" and "company").
In short, look at http://python.org/ , http://www.perl.org/ , and http://www.ruby-lang.org/en/ . Focus on enabling the developer to do something useful as soon as possible. Focus on community, libraries, etc... If you make one change and only one change to the site, add a link titled "Getting started"... make it a wiki. See http://www.erlang.org/starting.html for more inspiration. Right now it feels like the marketing department designed the the cilk site.