There are two things which can make a World Series memorable or noteworthy. One is an exciting 7-game Series, and the other is the appearance of teams which have never been to the Series, or have not been there for a very long time.
In terms of the first category, the decade of the 2000's has not been very memorable. While we did see exciting 7-game series in both 2001 and 2002, there have been none in the seven Series since than, and only two that have even gone 6 games.
However, in terms of the second category the past decade has been quite memorable indeed. 2001 saw the first appearance by the Diamondbacks, followed by the first appearance by the Angels in 2002. Then in 2004 the Red Sox broke their drought and won their first series since 1918. The following year the White Sox did the same, wining their first Series since 1917. Then in 2007 the Rockies made their first-ever WS appearance.
Now we come to 2010, featuring the Giants, who have not won since defeating my beloved Indians in 1954, and the Rangers, who have never been to the Series but finally made it in the 50th year of the franchise. Whoever wins, the result will be monumental for the franchise and city involved. Now if we can just get the Cubs vs. the Indians for nest year's Series!