<p>Currently, if you click on a user's name it takes you to their profile which contains exactly what you're describing for questions asked and answers given.  If you then click on the user's "activity tab" you can see a stream of their activity, including comments.  </p>

<p>Additionally, for every question, if you look in the lower portion of the right hand column there are the associated tags, when it was asked, how many times it's been viewed, if there are any linked questions, the <em>list of linked questions</em>, and finishing out that column is any <em>questions the stackexchange system thinks are related</em>.</p>
