Just a quick link to a very nice article on the recent history of Sun Microsystems. The Fast Company article explains the ups and downs for Sun during the pre and post dot com era.
I think Scott McNealy left some pretty big shoes to fill, but from what I have seen, Jonathan Schwartz has been doing quite nicely.
They also discuss the BlackBox project quite a bit and the rumors about what customers they are potentially building them for.
Check out the article here