you can read Patricia's whole, very thorough, article on the trade at:
http://www.dfw.net/~patricia/mavs/mavs-news/mavs8-19
It's the 3rd time in the last 4 years that Dallas has made a trade where
they've received a team's best player without giving up one of their best
3 players.
Interesting tidbit: Dallas is the sole reason that Golden State made the
draft day trade with Toronto of #4 for #5 plus money in 1998. Golden
State wanted Jamison all along. As part of his smoke screen for his real
intentions, Don Nelson floated rumors that Dallas wanted Jamison and was
going to try to trade up to get him. Golden State made the trade with
Toronto to prevent Dallas from trading with Toronto. Of course, Dallas
only had eyes for Nowitzki and would have taken him no matter what pick
they ended up with (Nelson has said that they had Nowitzki ranked #1 and
Pierce #2 in their wants from the 1998 draft).
Interesting tidbit #2: Danny Fortson and Howard Eisley both got their
over-paid and over-long contracts as sign-and-trades as part of a 4 team
trade involving Golden State, Dallas, Boston, and Utah in August of 2000.
Fortson signed a 7 year, $48 million contract and went from Boston to
Golden State. Eisley got a 7 year, $41 million contract and went from
Utah to Dallas.