I guess all kind of publicity is good publicity, but I would count as early adapters and after reading 2 blog posts(this one and the one posted by them) and exploring their site, I have no idea what they do.

I still don't see how "collaborative note taking"(whatever it means) is different, or more importantly, better than a wiki.

The marketing copy is making some wide claims and I am unable to follow.

> how we capture information (using personal tools),

That's as open ended as it gets. Notebook, bookmarks, wikis, emails, cms, reminders, calendar, todo...

> how we get work done (using team-based tools).

Team based tools: Git, Issue tracker, IRC, some wiki, basecamp style messaging

Non team based tools: Vim, some programming language, some framework, some libraries, browser to look up things, ebooks...

Now, I can see where the worlds collide(todos and issue trackers, emails and basecamp messaging), but I don't see where does the collaborative note taking come into action. If I need a discussion, I will use a threaded message board. If I am accumulating input, I will use a wiki.

Bottomline: If after much deliberation(much longer than 10 minutes), Rocketr's purpose is lost on me, I am not surprised it were lost on YC in a 10 minute assessment.